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JONA
Volume 47, Number 1, pp 41-49
Copyright B 2017 Wolters Kluwer Health, Inc. All rights
reserved.
T H E J O U R N A L O F N U R S I N G A D M I N I S T R A
T I O N
The Effect of Reported Sleep,
Perceived Fatigue, and Sleepiness on
Cognitive Performance in a Sample of
Emergency Nurses
Lisa A. Wolf, PhD, RN, CEN, FAEN
Cydne Perhats, MPH
Altair Delao, MPH
Zoran Martinovich, PhD
OBJECTIVE: The aim of this study is to explore
the relationship between reported sleep, perceived
fatigue and sleepiness, and cognitive performance.
BACKGROUND: Although evidence suggests that
fatigue and sleepiness affect the provision of care in
inpatient units, there is a lack of research on the sleep
patterns of emergency nurses and the effects of dis-
turbed sleep and fatigue on their cognitive abilities
and susceptibility to medical errors.
METHODS: A quantitative correlational design was
used in this study; in each of 7 different statistical models,
zero-order relationships between predictors and the
dependent variable were examined with appropriate
inferential tests.
RESULTS: Participants reported high levels of
sleepiness and chronic fatigue that impeded full
functioning both at work and at home.
CONCLUSIONS: Although high levels of self-reported
fatigue did not show any effects on cognitive function,
other factors in the environment may contribute to
delayed, missed, or inappropriate care. Further research
is indicated.
Studies of worker fatigue in the military and com-
mercial trucking industries1,2 suggest that long hours,
especially extending into overnight, can be hazardous
in terms of the potential for errors due to sleepiness
and reduced vigilance. Medical providers, both nurses
and physicians, are at risk because of the need for
around-the-clock coverage and the number and type
of decisions they must make in a given time span; in
1989, the Bell Commission Report cited sleep depri-
vation in medical house officers as a major contrib-
utor to the 1984 death of Libby Zion, an 18-year-old
who died at New York Hospital, leading to a restruc-
turing of the hours involved in medical residencies.3
The long (up to 36 hour) shifts of the medical resi-
dents in charge of her care and the consequences of
their fatigue on the decisions that were made were
cited as factors in her death. As a result of their inves-
tigation of the case, the Bell commission recommen-
ded limiting the work hours of medical residents to
less than 80 hours a week and no more than 24 hours
in a row, and subsequent research has led to similar
recommendations for the nursing workforce.4,5
Emergency care settings are chaotic environ-
ments, where there is high patient turnover, constantly
changing priorities and frequent changes in patient
condition. High demand work settings are associated
with increased fatigue, which can impair nurses_ at-
tentiveness and ability not only to recognize potential
errors they might commit but also to recognize and
mitigate the errors of others, including physicians.6,7
The work schedules of emergency nurses (ENs) are
characterized by increasing demands, irregular shifts,
and long hoursVall of which challenge their mental
and physical stamina. Although 12-hour shifts are
JONA � Vol. 47, No. 1 � January 2017 41
Author Affiliations: Director, Institute for Emergency Nursing
Research (Dr Wolf); Senior Research Associate (Mss Perhats
and Delao),
Emergency Nurses Association, Des Plaines; and Research
Assistant
Professor (Dr Martinovich), Department of Psychiatry,
Northwestern
University Feinberg School of Medicine, Evanston, Illinois.
The authors declare no conflicts of interest.
Correspondence: Dr Wolf, Institute for Emergency Nursing
Research, Emergency Nurses Association, 915 Lee St, Des
Plaines,
IL 60016 ([email protected]).
Supplemental digital content is available for this article. Direct
URL citations appear in the printed text and are provided in the
HTML and PDF versions of this article on the journal_s Web
site
(www.jonajournal.com).
DOI: 10.1097/NNA.0000000000000435
Copyright © 2016 Wolters Kluwer Health, Inc. All rights
reserved.
http://www.jonajournal.com
common, nurses frequently work additional hours;
work days may last 16 hours or more, often spread-
ing across evenings and nights with short intervals
between shifts. More than a decade ago, Rogers et al8
presented compelling evidence of increasing incident/
error rates during extended periods of work: Rates
rise after 9 hours, double after 12 consecutive hours,
and triple by 16 hours. Further studies have demon-
strated that insufficient sleep and inadequate recov-
ery time from long hours and shift work affect a
nurse_s ability to provide safe, effective patient care
and increase risks to personal safety.9-11 The Joint
Commission_s 2011 Sentinel Event Alert on health-
care worker fatigue and patient safety states that BShift
length and work schedules have a significant effect on
healthcare providers" quantity and quality of sleep and,
consequently, on their job performance, as well as
on the safety of their patients and their individual
safetyIStill, while the dangers of extended work
hours (912 hours) are well known, the healthcare
industry has been slow to adopt changes, particularly
with regard to nursingI[12(p1) Multiple studies support
that a significant number of inpatient nurses have im-
paired sleep quality, excessive sleepiness, and abnormal
fatigue, which are associated with a greater risk of
making medical errors and potentially causing harm to
patients.13-15 The research of Rogers and colleagues8
demonstrated that the 12-hour shift is past the point
where safe decision making may be expected, and
both the Agency for Health Research and Quality4
and the Institute of Medicine5 have since recommended
limiting the length of nurses_ shifts. Although evidence
suggests that both mental and physical fatigue and
sleepiness affect the provision of care in inpatient
units,16 there is a lack of research on the sleep patterns
of ENs and the effects of disturbed sleep and fatigue
on their cognitive abilities and susceptibility to making
medical errors. The purpose of this study is to explore
the relationship between reported sleep quality, per-
ceived fatigue and sleepiness, and cognitive perfor-
mance in a sample of ENs.
Methods
Before recruitment of subjects, institutional review
board approval was obtained and the study was
approved (Chesapeake Research Review, Columbia,
Maryland). A Certificate of Confidentiality from the
National Institutes of Health was obtained to further
protect the respondents_ anonymity given the sensi-
tive nature of the question. A quantitative correla-
tional design was used to explore the relationship
between nurses_ reported sleep patterns, perceived
sleepiness and fatigue, and their ability to carry out
timed cognitive tasks. As part of a 35-item online
questionnaire, participants performed 3 medication
dosage calculations and correlations between fatigue
and cognitive performance were measured in the
same survey. Predictors were selected based on
empirically based associations with work fatigue
and its impact on task performance.17 In each of 7
different statistical models, zero-order relationships
(ie, simple relationships that do not hold constant
other predictors) between each of the predictors and
the dependent variable were examined with appro-
priate inferential tests.
Sample
Of the 2,419 ENs who were recruited via e-mail
and social media, 2010 met eligibility criteria and
consented to participate. Eligibility criteria required
that study participants were English speaking, currently
licensed ENs working at least 1 shift per week in a
US emergency department (ED). Among those who
consented, 504 survey respondents were excluded
because they did not meet study criteria (eg, worked 1
shift or less in the past 30 days, did not complete survey
in 1 sitting), resulting in a total sample of 1506 ENs.
Research Questions
On the basis of the existing body of evidence, we hy-
pothesized that ENs_ patterns and quality of sleep,
sleepiness, and fatigue would have an attenuating
effect on their performance in timed cognitive skill
tests. To investigate these effects, we posed the fol-
lowing research questions:
Q1: Is there a relationship between ENs_ day-
time sleepiness and performance in timed cognitive
tests?
Q2: Is there a relationship between ENs_
patterns/quality of sleep and performance in timed
cognitive tests?
Q3: Is there a relationship between ENs_ fatigue
and performance in timed cognitive tests?
Data Collection
Using a Web platform (Qualtrics, Provo, Utah), study
participants were asked to complete an online survey
that included questions about participant and hospital
demographics (Tables 1 and 2), nurses_ work sched-
ules, reported sleep patterns and levels of fatigue, cog-
nitive performance measures, and routine activities of
daily living. Data on sleep patterns, sleep quality, and
fatigue were collected using the following 3 validated
and reliable instruments that were incorporated into
the online survey.
Q1 Instrument: The Epworth Sleepiness Scale
(ESS) is an 8-item self-rated questionnaire that measures
the general level of daytime sleepiness. Each item is scored
0 to 3, giving a total score of 0 to 24, which is a measure
42 JONA � Vol. 47, No. 1 � January 2017
Copyright © 2016 Wolters Kluwer Health, Inc. All rights
reserved.
of the subject_s average sleep propensity (ASP) in those
8 situations. An ESS score of 10 is most often consi-
dered to be the upper limit of normal. There is good
evidence for the validity of total ESS scores as a mea-
sure of ASP and a high level of internal consistency
within the ESS18 (Cronbach_s ! = .88-.74 in 4 different
groups of subjects).
Q2 Instrument: We included 2 subscales (9-item
subscale: Bhow often have you had trouble sleeping[
and 6-item subscale: Bhow often have you used the
following substances to help you get to sleep[) from
the Pittsburgh Sleep Quality Index (PSQI), which is a
19-item well-validated self-rated questionnaire for
evaluating subjective sleep quality over the previous
month19 (Cronbach_s ! = .83). We developed a third
8-item subscale to assess Bhow often has it been difficult
to do the following things because you were fatigued[
(internal consistency and reliability coefficient = .85).
Q3 Instrument: The Occupational Fatigue Ex-
haustion Recovery (OFER15) Scale is a self-report
questionnaire of 15 questions, which form 3 sub-
scales: chronic fatigue, acute fatigue, and intershift
recovery, respectively. The OFER Scale produces
comparable scores between 0 and 100 for each
subscale, with cut-points into levels of low, low/
moderate, moderate/high, and high on each subscale
used to compute quartiles of scale score distribution.
The subscales have high internal reliability (9.84)
and face, construct, and discriminant validity.20
Timed cognitive performance was measured by
the speed and accuracy for 3 weight-based medication
calculations that are frequently performed in emer-
gency nursing practice. The first 2 medication ques-
tions required calculation of the initial bolus and the
total dose for a thrombolytic medication order for an
older adult patient with a diagnosis of ischemic stroke.
The 3rd medication question required calculation of
the 1st dose of an antibiotic for a pediatric patient
with a diagnosis of strep throat. Survey participants
were instructed to complete the survey in 1 sitting and
without interruption. This was done so that we could
determine the speed and accuracy of the medication
calculations in relation to their perceived state of fatigue
at that time. The online survey software recorded start
and stop times for the medication calculations and for
completion of the questionnaire. Seven people were
eliminated from the study sample because their
response times were extreme outliers. All results were
scored and compiled in an SPSS database (version 22;
Armonk, New York) for analysis.
Predictors
Predictors were selected because of a presumed impact
of work fatigue on cognitive performance. Interval-
scaled predictors included the standardized items
(based on analytic sample norms) from each of the
3 instruments used in this study. We examined 29
categorical predictors including work schedules
(total hours in the past 30 days), shift types (length
Table 1. Participants" Demographics
(n = 1506)
Percentage of Survey
Respondents
Gender
Male 15.5
Female 84.5
Intersex 0.1
Missing 0
Age
18-24 2.0
25-34 23.0
35-44 24.0
45-54 24.9
55-64 25.0
Q65 1.1
Missing 0
Primary ED role
Staff nurse 68.9
Charge nurse 16.3
Case manager 0.1
Clinical coordinator 1.8
Clinical educator 2.7
Clinical nurse specialist 0.6
Director 1.4
Manager 3.1
Nurse practitioner 1.6
Trauma coordinator 0.8
Other 2.7
Missing 0
Years of experience Mean (SD)
In nursing 17.5 (12.5)
In emergency nursing 12.8 (10.1)
In current ED 8.2 (8.4)
In all areas of emergency care,
excludingnursing (eg, tech, etc)
5.9 (9.3)
Table 2. Facility Characteristics
Percentage of
Survey Respondents
ED patient population
General ED 86.0
Adult only 9.4
Pediatric only 4.6
Missing 0
Facility type
Nongovernment, not-for-profit 69.0
Investor owned, for-profit 18.8
State or local government 9.4
Federal government/VA/military 2.9
Missing 0
ED geographic location
Urban 39.9
Suburban 34.9
Rural 25.2
Missing 0
JONA � Vol. 47, No. 1 � January 2017 43
Copyright © 2016 Wolters Kluwer Health, Inc. All rights
reserved.
and time of day), sleep quality, and other life stressors
that could potentially contribute to fatigue (eg, 2nd
job, primary caregiver of children, and/or dependent
adults). Interval-scaled predictors included 14 survey
items regarding self-perceptions of fatigues, sleepiness,
and demographic characteristics such as age and year
of emergency nursing experience. Linear predictors
were standardized so that all effect estimates refer to
the impact of a 1 standard deviation change. Estimates
for 2 interval-scaled predictors were also obtained for
untransformed scores.
Data Analysis
Correlational analyses were performed using speed
and accuracy of the medication dosage calculations
as the dependent variable. Speed and accuracy data
were examined via 7 statistical models: OLS regres-
sion model predicting time in minutes on the page;
Cox regression model predicting time to fully correct
response (3/3 questions); Cox regression model predict-
ing time to partially correct response (2/3 questions);
3 logistic regression models predicting the probability
of a correct response for each individual medication
dosage calculation; and a polytomous logistic regres-
sion (PLUM) model predicting the number of correct
responses (of 3).
In each of 7 different statistical models, zero-
order relationships (ie, simple correlations or simple
contrasts of group vs full sample) between each pre-
dictor and the dependent variable (time and accuracy
of response) were examined with appropriate inferen-
tial tests (relative ratio, odds ratios, Wald z tests, P
values). Probability estimates were calculated for each
group and for the full sample. Inferential tests con-
trasted each group_s estimated probability of a correct
response to the medication calculation versus all other
groups combined (ie, contrasting each group versus the
full sample) and results were reported with associated
Wald z tests and P values.
Results
Descriptive Statistics
In this sample of 1506 participants who provided valid
responses on all items, it took an average of 21.6 minutes
to complete the 34 items in the online questionnaire. Cog-
nitive performance was measured by 3-timed medica-
tion dosage calculations (see Table, Supplemental
Digital Content 1, http://links.lww.com/JONA/A499).
Overall, respondents averaged 3.78 minutes to com-
plete the problem set and the average number of cor-
rect answers was 1.95 of 3. More specifically, the
percentages with 0, 1, 2, or 3 correct answers were
11.2% (n = 168), 17.4% (n = 262), 36.5% (n = 549),
and 35.0% (n = 527), respectively.
Work Schedules
The primary work schedule for this group of nurses
consisted of 12-hour shifts (74%), with a mean
shift length of 11 T 2 hours and an average of 152 T
50 hours worked in the preceding 30 days. Survey
data indicate that the mean number of shifts worked
in that period was 13 T 4, with 30% of the nurses
working all those shifts consecutively and 65%
working at least some consecutive shifts. The re-
ported numbers of extended work shifts ranged from
0 (39%), 1 to 3 (30%), 4 to 10 (25%), and 11 to
24 (5%). The primary reason given for working an
extended shift was to meet patient care needs (47%).
Sleep, Fatigue, and Cognitive Performance
Study participants reported varying levels of sleepi-
ness, sleep disturbance, and fatigue as measured by
their responses on the 3 scaled instruments. Most nota-
bly, 4 of every 10 nurses reported levels of daytime
sleepiness above the upper limit of normal (an ESS
score of Q10; sample mean, 9.5). In addition, most
nurses reported moderately high (60-75) to high (975)
levels of fatigue, with 50% of chronic and 75% of
acute subscale scores falling between 60 and 100
(Figure 1). Roughly half (51%) of participants also
had low to low/moderate scores on intershift recovery
(score of 0-50), indicating that they are vulnerable to
developing chronic or persistent fatigue.
Thirty-five percent of respondents rated their
sleep quality as bad or fairly bad during the preceding
30 days; 26.8% reported that they slept an average of
5 hours or less per night and used various over-the-
counter or prescribed medications, herbal remedies,
and alcohol as sleep aids. A substantial number of
nurses reported that their fatigue resulted in occasional
or frequent difficulties with activities of daily living,
such as driving (38.1%), eating regular meals (65.1%),
exercising (66%), managing stress 76.3%), and attend-
ing to personal (67%) and family (69.6%) needs
(Table 3). Nearly half (46.8%) of study participants
reported that their fatigue made it difficult to pro-
vide safe patient care at least some of the time.
Figure 1. Reported scores for chronic and acute fatigue.
44 JONA � Vol. 47, No. 1 � January 2017
Copyright © 2016 Wolters Kluwer Health, Inc. All rights
reserved.
http://links.lww.com/JONA/A499
Inferential Statistics
Seven different statistical models were used to examine
zero-order relationships between each of the predictors
and the dependent variable (speed and accuracy of
response). Analysis of the interval-scaled predictors for
sleep patterns, sleep quality and fatigue (ESS, modified
PSQI, OFER15) did not detect any significant zero-
order effects within any of the 7 models (Table 4).
Nurses_ work schedules, caregiver status, and working
a 2nd job did show a significant effect on cognitive
performance. Nurses who worked the 7 AM to 7 PM
shift (n = 511) showed significantly poorer response
accuracy on several indicators (Table 5). These sub-
jects had a 25% lower probability (time-adjusted) of a
fully correct response set versus other nurses (mean, 1.87
vs 1.95; odds ratio [OR], 0.78; z = j2.45, P = .14). They
were also more likely to give an incorrect answer for the
pediatric dose calculation (mean, 41.3% vs 47.3%; z =
j3.36, P = .001). In contrast, nurses who worked the
7 PM to 7 AM shift (n = 418) had better time-adjusted
accuracy estimates based on the 2 Cox regression
models. Their probability of generating a fully
correct response was 1.27 times greater (z = 2.48,
P = .013). Similar effects were found for subjects
with a 2nd part-time or full-time job (n = 426) and
for those who were primary caregivers of children
(n = 541), with both groups completing the problem
set faster and more accurately than those with no
additional job or caregiver responsibilities.
Discussion
Based on the existing body of evidence, we hypoth-
esized that ENs_ sleep pattern, sleep quality, and
Table 3. Activities of Daily Living (ADL): Functional Impact of
Fatigue (Modified PSQI Subscale)
In the past month, how often has it been difficult for you to do
the following things because you were fatigued?
(valid percent; internal reliability and consistency coefficient =
.85)
Activity Never Difficult, % Sometimes Difficult, % Frequently
Difficult, % Always Difficult, %
Engage in social activities 14.8 46.9 28.1 10.2
Manage stress 17.5 52.9 23.4 6.2
Attend to family needs 25.8 48.2 21.4 4.6
Eat regular meals 21.9 35.7 29.4 13.0
Provide safe patient care 52.7 43.0 3.8 0.5
Safely operate a motor vehicle 61.2 33.8 4.3 0.7
Exercise 10.8 32.4 34.0 22.8
Attend to personal needs 27.6 45.4 21.6 5.4
Table 4. Effect of Sleep and Fatigue on Responses to
Medication Problem Set: 7 Statistical Models
for Interval Scale Predictorsa (n = 1506)
DV1: Correlation
With Time (Minutes
to Complete
Problem Set)
DV2: RR
of Fully
Correct
Response (3/3)
DV3: RR
of Partially
Correct
Response (2/3)
DV4: %
Correct
(Activase
Initial)
DV5: %
Correct
(Activase
Total)
DV6: %
Correct
(Amoxicillin
1st Dose)
DV7:
Number
Correct
(1-3)
r RR RR OR OR OR OR
Daytime sleepiness and fatigue
Daytime sleepiness 0.00 1.02 1.00 1.06 0.96 1.01 1.02
Chronic fatigue 0.04 0.93 0.95 0.95 0.97 0.95 0.95
Acute fatigue j0.01 1.02 1.02 0.97 1.02 1.00 1.00
Persistent fatigue 0.01 1.01 0.99 1.02 0.98 1.03 1.01
ADL Functional
Impact Scale
j0.03 1.05 1.04 0.99 0.95 1.06 1.01
Sleep patterns and quality
Average hours of sleep j0.02 1.02 1.02 0.98 0.97 1.02 0.99
Average hours of
sleep (not
standardized)
j0.02 1.02 1.02 0.98 0.97 1.02 0.99
Sleep quality j0.03 1.03 1.04 1.04 1.03 1.01 1.02
Sleep quality (not
standardized)
j0.33 1.05 1.06 1.07 1.04 1.01 1.03
Abbreviations: OR, odds ratio; RR, relative risk.
aNo significant deviations versus full sample for r, RR, or OR
estimates were detected.
JONA � Vol. 47, No. 1 � January 2017 45
Copyright © 2016 Wolters Kluwer Health, Inc. All rights
reserved.
fatigue would affect their performance on timed tests
of cognitive skills that are commonly required in EN
practice. Descriptive and inferential analyses performed
on this data set describe frequent sleep loss, poor sleep
quality, and difficulty with activities of daily living due
to fatigue (Table 3). Twelve-hour work shifts were the
norm among our study participants (74% of reported
shifts), with an average shift length of 11 hours. Thus,
any extension of work schedules places these nurses
at increased risk of potential harm to patients and
themselves.8-11 Of particular concern is the finding
that nearly half (46.8%) of study participants reported
that their fatigue made it difficult to provide safe
patient care at least some of the time.
Previous researchers have reported higher error
rates among nurses who worked rotating shifts21 and
night shifts.13 In contrast, nurses in our study who
worked the 7 AM to 7 PM day shift showed signifi-
cantly poorer response accuracy when compared
with nurses who worked any other shift (Table 5).
Participants who reported having specific stressors (ie,
being a primary caregiver or working a 2nd full or
part-time job in addition to their ED employment)
answered the problem set with greater speed and
accuracy than did those who did not have those res-
ponsibilities. These unexpected findings stimulate a
number of alternative hypotheses that have been raised
in the literature and are worth further consideration.
Effects of Job Demands and High-Stress
Environments
There is a substantial body of literature on the rela-
tionship between job performance, fatigue, and ex-
posure to repetitive, high levels of stress without
adequate recovery between episodes.9,13-24 Our
sample of ENs reported high levels of acute fatigue,
low intershift recovery, and difficulties with manag-
ing their daily routine (eg, eating regular meals, driv-
ing safely, providing safe patient care), consistent
with previous research that suggests that workers
Table 5. Effect of Shift Type on Responses to Medication
Problem Set: 7 Statistical Models for
Categorical Predictors
Survey question: During the past month, on which shift did you
primarily work in your ED? (n = 1506)
DV1: Time in Minutes to
Complete Problem Set
DV2: Relative RiskVFully
Correct Response (3/3)
DV3: Relative RiskVPartially
Correct (2/3)
n Mean t P RR Wald z P RR Wald z P
7 AM-3 PM 98 3.82 0.20 .842 1.07 0.38 .706 1.09 0.73 .463
7 AM-7 PM 511 3.90 1.36 .174 0.75 j3.04 .002 0.89 j1.85 .065
7 PM-7 AM 418 3.58 j1.94 .052 1.27 2.48 .013 1.15 2.06 .040
11 PM-7 AM 21 4.30 1.00 .316 0.45 j1.59 .112 0.71 j1.21 .226
11 AM-11 PM 136 3.63 j0.76 .446 1.08 0.54 .587 1.10 0.88 .380
3 PM-11 PM 31 3.61 j0.39 .694 1.81 2.40 .016 1.12 0.52 .606
3 PM-3 AM 51 3.67 j0.31 .758 0.96 j0.15 .883 0.93 j0.40 .687
DV4: % Correct
(Activase Initial)
DV5: % Correct
(Activase Total)
DV6: % Correct
(Amoxicillin 1st Dose)
n % Wald z P % Wald z P % Wald z P
7 AM-3 PM 98 78.6 1.19 .236 79.6 1.19 .233 48.0 0.13 .900
7 AM-7 PM 511 72.8 j0.40 .686 73.2 j0.84 .403 41.3 j3.36 .001
7 PM-7 AM 418 74.2 0.39 .694 76.1 0.87 .385 49.5 1.05 .294
11 PM-7 AM 21 66.7 j0.70 .481 61.9 j1.32 .188 42.9 j0.41 .679
11 AM-11 PM 136 74.3 0.23 .819 72.8 j0.48 .632 52.9 1.37 .171
3 PM-11 PM 31 80.6 0.91 .362 74.2 j0.04 .968 64.5 1.90 .058
3 PM-3 AM 51 58.8 j2.36 .018 58.8 j2.56 .010 52.9 0.81 .416
DV7: Number of Correct Responses (Out of 3)
n Mean 0, % 1, % 2, % 3, % OR Wald z P
7 AM-3 PM 98 2.04 9.6 15.7 35.9 38.8 1.19 0.92 .355
7 AM-7 PM 511 1.87 12.8 19.1 36.7 31.4 0.78 j2.45 .014
7 PM-7 AM 418 2.01 10.2 16.3 36.2 37.3 1.15 1.31 .191
11 PM-7 AM 21 1.69 16.9 22.4 35.8 24.9 0.61 j1.24 .217
11 AM-11 PM 136 2.00 10.4 16.5 36.2 36.9 1.10 0.55 .581
3 PM-11 PM 31 2.24 6.6 11.7 32.7 49.0 1.81 1.73 .084
3 PM-3 AM 51 1.73 15.8 21.7 36.1 26.4 0.66 j1.63 .102
Data in bold indicate significant deviations versus the full
sample.
46 JONA � Vol. 47, No. 1 � January 2017
Copyright © 2016 Wolters Kluwer Health, Inc. All rights
reserved.
with similar levels of maladaptive chronic fatigue are
more vulnerable to the detrimental consequences of
work-related stress and fatigue, with adequate re-
covery being a key mediating factor.24-26 Additional
results from 2 Australian studies found that the psycho-
logical strain that nurses experience in high-paced,
demanding jobs and lower levels of fulfilling non-
work activities were associated with poorer sleep quality
and reduced ability to recover between shifts.27,28
Similarly, the unexpected finding that 12-hour
night shift workers performed better than 12-hour
day shift workers could be a function of differences in
environmental stress both within and between hospitals.
Possibly, the night shift manages fewer interruptions
from other hospital departments and fewer distractions
owing to comparatively fewer workplace and personal
demands than are experienced on the day shift. Re-
search suggests that fatigue, along with inadequate rest
and recovery between ED shifts, may reduce ENs_
ability to be vigilant and recognize the potential for
error.29 In his examination of the effects of sleep depri-
vation on cognition, Killgore17 concluded that sleep
loss has a differential effect on specific cognitive and
emotional processes, with some indication that higher-
level cognitive capacities (eg, memory, judgment,
decision-making) might remain degraded despite resto-
ration. The frequent extension of 12-hour shifts,
inadequate time off between shifts, and constant
exposure to demanding work may have contributed
to difficulties with performing some nursing tasks
(eg, medication calculations) within our sample of
ENs, nearly half of whom reported that fatigue made
it difficult for them to provide safe patient care.
Variations in nurses" vigilance between day and
night shifts and/or over the duration of individual
shifts may have contributed to performance differ-
ences in our sample. Surani and colleagues14 found
that vigilance improved over the duration of the shift;
in particular, fast reaction times were significantly
shorter in floor nurses after shift than before it. The
authors concluded that Bthere may also be impair-
ment related to the intensive care unit (ICU) setting,
where higher patient acuity requires even more
vigilance,[ suggesting that the high-acuity ED envi-
ronment may have an attenuating effect on ENs" job
performance. Because we did not collect data on these
types of parameters, we were not able to assess similar
effects that could have contributed to our findings.
Given the considerable costs of work-related fatigue (eg,
injuries), further research is warranted using chronobio-
logical objective sleep measures to more effectively
evaluate the effects of sleep deprivation30 as well as
recommended strategies (eg, work hour limits)31
that could improve the health and safety of the EN
workforce and the patients they care for.
Limitations
The sample was a self-selecting group of ENs who
reported on their sleep patterns and levels of fatigue;
no objective measures of fatigue were collected. We
also did not collect data on environmental factors that
may have affected results. In addition, although the study
instruments have been widely used, to our knowledge,
they have not been used to measure work-related fatigue
among ENsVa subgroup that reports high levels of acute
and chronic fatigue that may be above those found in the
general nursing population. As an example, researchers
found a greater discrepancy in test-retest ESS scores
among patients with possible sleep-disordered breathing
than has been previously reported in studies that
examined reproducibility only in normal subjects.32
Similarly, high levels of acute and chronic fatigue within
our study population could have resulted in limited
ability to detect effects of poor sleep quality and fatigue
on ENs" cognitive function. Moreover, because we did
not collect data on variables such as work environment,
vigilance, or the timing of survey completion (eg,
whether study participants completed the medication
problem set during midshift, postshift, or on a day off),
we can neither support nor reject the null hypothesis
that work-related fatigue has an attenuating effect on
ENs_ cognitive function.
Conclusions
A significant percentage of our sample of 1,506 ENs
reported high levels of sleepiness and chronic and
acute fatigue that impeded full functioning both at
work and at home. Although we could not determine
from this study whether levels of self-reported fatigue
affect cognitive function, participants did report
difficulty with providing both self-care and patient
care. Other factors in the environment may contrib-
ute to the effects of EN fatigue and resultant delayed,
missed, or inappropriate care. Further research on the
effect of ENs_ work schedules, physical and emo-
tional fatigue, patterns and quality of sleep, and work-
place conditions on their ability to safely and effectively
perform their jobs in the high-demand environment
of the ED is required. There is compelling evidence
to suggest that fatigue reduction interventions could
contribute to overall improvements in the delivery of
care, including reduction in medical errors.31 Nurse
administrators may consider a fatigue management
reduction system as described by Lerner et al in the
guidance statement of the American College of Occu-
pational and Environmental Medicine (ACOEM).
The ACOEM, the Canadian Nurses Association, and
the American Nurses Association33-35 offer specific sug-
gestions to recognize and mitigate fatigue, including
limiting weekly and consecutive work hours (eg, no
JONA � Vol. 47, No. 1 � January 2017 47
Copyright © 2016 Wolters Kluwer Health, Inc. All rights
reserved.
more than 40 hours in a 7-day period and limit work
shifts to 12 hours in a 24-hour period)35; develop-
ing processes to document fatigue in the workplace
and its relationship to overtime, maximum hours
worked per day and per week, on-call hours, and data
related to patient error, staff retention levels, and
recruitment results; developing policies that provide
time and space for rest periods, meals, and other health
promotion initiatives for sleep hygiene; educating
nursing staff and management in recognizing and
managing fatigue in self and others, to include
understanding the science of sleep, the risks associated
with fatigue, and approaches to circadian rhythm
disturbances; and providing sleep facilities to enable
nurses to minimize their circadian disruptions during
evening and night shift work.
References
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2. Caldwell JA, Caldwell JL. Fatigue in military aviation: an
overview of US military-approved pharmacological countermea-
sures. Aviat Space Environ Med. 2005;76(7 suppl):C39-C51.
3. Douglas RG, Hayes JG, Roberts RB, Bardes CL. Bell Com-
mission requirements: doctors or factory workers? Trans Am
Clin Climatol Assoc. 1990;101:91-102.
4. Hughes RG. Patient Safety and Quality: An Evidence-Based
Handbook for Nurses. Rockville, MD: Agency for Healthcare
Research and Quality; 2008. AHRQ publication no. 08-0043.
5. Page A. Keeping Patients Safe: Transforming the Work Envi-
ronment of Nurses. Washington, DC: National Academy Press;
2003. doi:10.17226/10851.
6. Lockley SW, Barger LK, Ayas NT, Rothschild JM, Czeisler
CA, Landrigan CP. Effects of health care provider work hours
and sleep deprivation on safety and performance. J Qual
Patient Saf. 2007;33(11):7-17.
7. Smith-Miller CA, Shaw-Kokot J, Curro B, Jones CB. An inte-
grative review: fatigue among nurses in acute care settings.
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8. Rogers AE, Hwang W-T, Scott LD, Aiken LH, Dinges DF.
The working hours of hospital staff nurses and patient safety:
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staff nurses work twelve or more hours at a stretch. Health
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9. Geiger-Brown J, Trinkoff AM. Is it time to pull the plug on
12-hour shifts?, part 1: the evidence. J Nurs Adm. 2010;40(3):
100-102. doi:10.1097/NNA.0b013e3181d0414e.
10. Trinkoff AM, Johantgen M, Storr CL, Gurses AP, Liang Y,
Han K. Nurses_ work schedule characteristics, nurse staff-
ing, and patient mortality. Nurs Res. 2011;60(1):1-8. doi:10.
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11. Rogers AE. The effects of fatigue and sleepiness on nurse
performance and patient safety. In: Hughes RG, ed. Patient
Safety andQuality: An Evidence-BasedHandbook forNurses.
Vol. 2. Rockville, MD: AHRQ Publications; 2008:509-533.
12. The Joint Commission. Health care worker fatigue and
patient
safety. Sentinel Event Alert 2011;48:1-4. http://www.joint
commission.org/assets/1/18/SEA_48.pdf. Accessed June 15,
2015.
13. Johnson AL, Jung L, Song Y, Brown K, Weaver MT,
Richards
KC. Sleep deprivation and error in nurses who work the night
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0000000000000016.
14. Surani S, Hesselbacher S, Guntupalli B, Surani S,
Subramanian
S. Sleep quality and vigilance differ among inpatient nurses
based on the unit setting and shift worked. J Patient Saf. 2015;
11(4):215-220. doi:10.1097/PTS.0000000000000089.
15. Dorrian J, Tolley C, Lamond N, et al. Sleep and errors in a
group of Australian hospital nurses at work and during the
commute. Appl Ergon. 2008;39(5):605-613. doi:10.1016/j.
apergo.2008.01.012.
16. Barker LM, Nussbaum MA. Fatigue, performance and the
work environment: a survey of registered nurses. J Adv Nurs.
2011;67(6):1370-1382.
17. Killgore W. Effects of sleep deprivation on cognition. Prog
Brain Res. 2010;185:105-129.
18. Johns MW. A new method for measuring daytime
sleepiness:
the Epworth Sleepiness Scale. Sleep. 1991;14(6):540-545.
19. Buysse DJ, Reynolds CF 3rd, Monk TH, Berman SR, Kupfer
DJ.
The Pittsburgh Sleep Quality Index: a new instrument for
psychiatric practice and research. Psychiatry Res. 1989;28(2):
193-213.
20. Winwood PC, Lushington K, Winefield AH. Further
development and validation of the Occupational Fatigue
Exhaustion Recovery (OFER) Scale. J Occup Environ Med.
2006;48(4):381-389.
21. Niu SF, Chu H, Chen CH, et al. A comparison of the effects
of fixed- and rotating-shift schedules on nursing staff attention
levels: a randomized trial. Biol Res Nurs. 2013;15(4):443-450.
doi:10.1177/1099800412445907.
22. Querstret D, Cropley M. Exploring the relationship between
work-related rumination, sleep quality, and work-related
fatigue. J Occup Health Psychol. 2012;17(3):341-353. doi:
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23. Pasupathy KS, Barker LM. Impact of fatigue on
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in registered nurses: data mining and implications for practice. J
HealthcQual. 2012;34(5):22-30. doi:10.1111/j.1945-1474.2011.
00157.x.
24. Winwood PC, Winefield AH, Lushington K. Work-related
fatigue and recovery: the contribution of age, domestic
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bilities and shiftwork. J Adv Nurs. 2006;56(4):438-449.
25. McEwen BS. Sleep deprivation as a neurobiologic and phy-
siologic stressor: allostasis and allostatic load. Metabolism.
2006;55(10 suppl 2):S20-S23.
26. McEwen BS. From molecules to mind: stress, individual dif-
ferences, and the social environment. Ann NYAcad Sci. 2001;
935:42-49.
27. Winwood PC, Bakker AB, Winefield AH. An investigation
of the role of non-work-time behaviour in buffering the effects
of work strain. J Occup Environ Med. 2007;49(8):862-871.
28. Winwood PC, Lushington K. Disentangling the effects of
psychological and physical work demands on sleep, recovery
and maladaptive chronic stress outcomes within a large sample
of Australian nurses. J Adv Nurs. 2006;56(6):679-689.
29. Fallis WM, McMillan DE, Edwards MP. Napping during
night shift: practices, preferences, and perceptions of critical
care and emergency department nurses. Crit Care Nurse.
2011;31(2):e1-11. doi:10.4037/ccn2011710.
30. Geiger-Brown J, Rogers VE, Trinkoff AM, Kane RL,
Bausell
RB, Scharf SM. Sleep, sleepiness, fatigue, and performance
48 JONA � Vol. 47, No. 1 � January 2017
Copyright © 2016 Wolters Kluwer Health, Inc. All rights
reserved.
http://www.jointcommission.org/assets/1/18/SEA_48.pdf
http://www.jointcommission.org/assets/1/18/SEA_48.pdf
of 12-hour-shift nurses. Chronobiol Int. 2012;29(2):211-219.
doi:10.3109/07420528.2011.645752.
31. Landrigan CP, Czeisler CA, Barger LK, et al. Effective
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mentation of work-hour limits and systemic improvements.
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32. Nguyen AT, Baltzan MA, Small D, Wolkove N, Guillon S,
Palayew M. Clinical reproducibility of the Epworth Sleep-
iness Scale. J Clin Sleep Med. 2006;2(2):170-174.
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34. Canadian Nurses Association. Research Report: Nurse
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ities of registered nurses and employers to reduce risks. 2014.
Accessed July 21, 2016 from www.nursingworld.org.
JONA � Vol. 47, No. 1 � January 2017 49
Copyright © 2016 Wolters Kluwer Health, Inc. All rights
reserved.
http://www.nursingworld.org
CYBR 515 Case Study – Architecture Firm.
Dalton, Walton, & Carlton, Inc. is an architecture firm with
approximately 250 employees in four cities in a regional area.
The main office is in Kansas City, Mo, which houses 100 of the
employees. The main office is located in a suburb
neighborhood where physical security is not considered a
concern.
Their IT infrastructure is as follows:
· They primarily use Microsoft servers and PCs with a number
of Mac computers used to perform design work. They use
Active Directory, have a Web Server for their Internet web site,
four servers used as file shares (one in each office), four servers
housing their architecture applications, a training server, five
MS SQL database servers, and two Microsoft Exchange servers
for email.
· There are 20 Windows 2012 servers in the main office, twelve
of which are virtualized on three physical servers.
· System updates and patches are run from the main office. Most
systems get Microsoft updates once a month, but some are
missed. Also, most third party products (e.g., Adobe PDF &
Flash) are not kept up to date.
· Each satellite office has 3-4 servers for storing files and
running local applications.
· Each office has its own, decentralized wireless network
connected to the production network.
· Each employee has a desktop or laptop PC running Windows
7. HR personnel have laptops for conducting interviews.
· They outsource their email spam filter and all HR applications
to two separate third party companies.
· The network sits behind a gateway router and firewall.
Antivirus is in use, but is not automatically updated across the
company. Employees often work remotely and only use their
login and password to gain access to the corporate systems.
· There is a Director of IT who has a full time staff of 5
employees, one of which does security duties part time.
There are a few known issues with their IT infrastructure and
organization:
· Recently, a number of PCs and office equipment has been
stolen out of the office.
· It’s at the data owner’s discretion as to whether or not to
secure their data files or folders. Many do not secure their
files, while some lock them so only they have access. There
have been rumors that customer data and intellectual property
have been lost.
· Two employees recently left your company and went to your
biggest competitor, where they just landed a contract with your
largest account.
· Vendors are allowed access to the site and computers without
authorization or supervision.
· Onsite staff at each location provides IT support part time
along with their other responsibilities. Password resets are done
by giving out a generic password — Chiefs2017.
You are an independent auditor brought in by Dalton, Walton, &
Carlton’s management. They’ve tasked you with conducting an
audit of their entire IT infrastructure, organization, and
processed.
Bellevue University CYBR 515 as of: August 2017
JONAVolume 47, Number 1, pp 41-49Copyright B 2017 Wolters .docx

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JONAVolume 47, Number 1, pp 41-49Copyright B 2017 Wolters .docx

  • 1. JONA Volume 47, Number 1, pp 41-49 Copyright B 2017 Wolters Kluwer Health, Inc. All rights reserved. T H E J O U R N A L O F N U R S I N G A D M I N I S T R A T I O N The Effect of Reported Sleep, Perceived Fatigue, and Sleepiness on Cognitive Performance in a Sample of Emergency Nurses Lisa A. Wolf, PhD, RN, CEN, FAEN Cydne Perhats, MPH Altair Delao, MPH Zoran Martinovich, PhD OBJECTIVE: The aim of this study is to explore the relationship between reported sleep, perceived fatigue and sleepiness, and cognitive performance. BACKGROUND: Although evidence suggests that fatigue and sleepiness affect the provision of care in inpatient units, there is a lack of research on the sleep patterns of emergency nurses and the effects of dis- turbed sleep and fatigue on their cognitive abilities and susceptibility to medical errors. METHODS: A quantitative correlational design was used in this study; in each of 7 different statistical models,
  • 2. zero-order relationships between predictors and the dependent variable were examined with appropriate inferential tests. RESULTS: Participants reported high levels of sleepiness and chronic fatigue that impeded full functioning both at work and at home. CONCLUSIONS: Although high levels of self-reported fatigue did not show any effects on cognitive function, other factors in the environment may contribute to delayed, missed, or inappropriate care. Further research is indicated. Studies of worker fatigue in the military and com- mercial trucking industries1,2 suggest that long hours, especially extending into overnight, can be hazardous in terms of the potential for errors due to sleepiness and reduced vigilance. Medical providers, both nurses and physicians, are at risk because of the need for around-the-clock coverage and the number and type of decisions they must make in a given time span; in 1989, the Bell Commission Report cited sleep depri- vation in medical house officers as a major contrib- utor to the 1984 death of Libby Zion, an 18-year-old who died at New York Hospital, leading to a restruc- turing of the hours involved in medical residencies.3 The long (up to 36 hour) shifts of the medical resi- dents in charge of her care and the consequences of their fatigue on the decisions that were made were cited as factors in her death. As a result of their inves- tigation of the case, the Bell commission recommen- ded limiting the work hours of medical residents to less than 80 hours a week and no more than 24 hours in a row, and subsequent research has led to similar recommendations for the nursing workforce.4,5
  • 3. Emergency care settings are chaotic environ- ments, where there is high patient turnover, constantly changing priorities and frequent changes in patient condition. High demand work settings are associated with increased fatigue, which can impair nurses_ at- tentiveness and ability not only to recognize potential errors they might commit but also to recognize and mitigate the errors of others, including physicians.6,7 The work schedules of emergency nurses (ENs) are characterized by increasing demands, irregular shifts, and long hoursVall of which challenge their mental and physical stamina. Although 12-hour shifts are JONA � Vol. 47, No. 1 � January 2017 41 Author Affiliations: Director, Institute for Emergency Nursing Research (Dr Wolf); Senior Research Associate (Mss Perhats and Delao), Emergency Nurses Association, Des Plaines; and Research Assistant Professor (Dr Martinovich), Department of Psychiatry, Northwestern University Feinberg School of Medicine, Evanston, Illinois. The authors declare no conflicts of interest. Correspondence: Dr Wolf, Institute for Emergency Nursing Research, Emergency Nurses Association, 915 Lee St, Des Plaines, IL 60016 ([email protected]). Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal_s Web site
  • 4. (www.jonajournal.com). DOI: 10.1097/NNA.0000000000000435 Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved. http://www.jonajournal.com common, nurses frequently work additional hours; work days may last 16 hours or more, often spread- ing across evenings and nights with short intervals between shifts. More than a decade ago, Rogers et al8 presented compelling evidence of increasing incident/ error rates during extended periods of work: Rates rise after 9 hours, double after 12 consecutive hours, and triple by 16 hours. Further studies have demon- strated that insufficient sleep and inadequate recov- ery time from long hours and shift work affect a nurse_s ability to provide safe, effective patient care and increase risks to personal safety.9-11 The Joint Commission_s 2011 Sentinel Event Alert on health- care worker fatigue and patient safety states that BShift length and work schedules have a significant effect on healthcare providers" quantity and quality of sleep and, consequently, on their job performance, as well as on the safety of their patients and their individual safetyIStill, while the dangers of extended work hours (912 hours) are well known, the healthcare industry has been slow to adopt changes, particularly with regard to nursingI[12(p1) Multiple studies support that a significant number of inpatient nurses have im- paired sleep quality, excessive sleepiness, and abnormal fatigue, which are associated with a greater risk of
  • 5. making medical errors and potentially causing harm to patients.13-15 The research of Rogers and colleagues8 demonstrated that the 12-hour shift is past the point where safe decision making may be expected, and both the Agency for Health Research and Quality4 and the Institute of Medicine5 have since recommended limiting the length of nurses_ shifts. Although evidence suggests that both mental and physical fatigue and sleepiness affect the provision of care in inpatient units,16 there is a lack of research on the sleep patterns of ENs and the effects of disturbed sleep and fatigue on their cognitive abilities and susceptibility to making medical errors. The purpose of this study is to explore the relationship between reported sleep quality, per- ceived fatigue and sleepiness, and cognitive perfor- mance in a sample of ENs. Methods Before recruitment of subjects, institutional review board approval was obtained and the study was approved (Chesapeake Research Review, Columbia, Maryland). A Certificate of Confidentiality from the National Institutes of Health was obtained to further protect the respondents_ anonymity given the sensi- tive nature of the question. A quantitative correla- tional design was used to explore the relationship between nurses_ reported sleep patterns, perceived sleepiness and fatigue, and their ability to carry out timed cognitive tasks. As part of a 35-item online questionnaire, participants performed 3 medication dosage calculations and correlations between fatigue and cognitive performance were measured in the
  • 6. same survey. Predictors were selected based on empirically based associations with work fatigue and its impact on task performance.17 In each of 7 different statistical models, zero-order relationships (ie, simple relationships that do not hold constant other predictors) between each of the predictors and the dependent variable were examined with appro- priate inferential tests. Sample Of the 2,419 ENs who were recruited via e-mail and social media, 2010 met eligibility criteria and consented to participate. Eligibility criteria required that study participants were English speaking, currently licensed ENs working at least 1 shift per week in a US emergency department (ED). Among those who consented, 504 survey respondents were excluded because they did not meet study criteria (eg, worked 1 shift or less in the past 30 days, did not complete survey in 1 sitting), resulting in a total sample of 1506 ENs. Research Questions On the basis of the existing body of evidence, we hy- pothesized that ENs_ patterns and quality of sleep, sleepiness, and fatigue would have an attenuating effect on their performance in timed cognitive skill tests. To investigate these effects, we posed the fol- lowing research questions: Q1: Is there a relationship between ENs_ day- time sleepiness and performance in timed cognitive tests? Q2: Is there a relationship between ENs_
  • 7. patterns/quality of sleep and performance in timed cognitive tests? Q3: Is there a relationship between ENs_ fatigue and performance in timed cognitive tests? Data Collection Using a Web platform (Qualtrics, Provo, Utah), study participants were asked to complete an online survey that included questions about participant and hospital demographics (Tables 1 and 2), nurses_ work sched- ules, reported sleep patterns and levels of fatigue, cog- nitive performance measures, and routine activities of daily living. Data on sleep patterns, sleep quality, and fatigue were collected using the following 3 validated and reliable instruments that were incorporated into the online survey. Q1 Instrument: The Epworth Sleepiness Scale (ESS) is an 8-item self-rated questionnaire that measures the general level of daytime sleepiness. Each item is scored 0 to 3, giving a total score of 0 to 24, which is a measure 42 JONA � Vol. 47, No. 1 � January 2017 Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved. of the subject_s average sleep propensity (ASP) in those 8 situations. An ESS score of 10 is most often consi- dered to be the upper limit of normal. There is good evidence for the validity of total ESS scores as a mea- sure of ASP and a high level of internal consistency
  • 8. within the ESS18 (Cronbach_s ! = .88-.74 in 4 different groups of subjects). Q2 Instrument: We included 2 subscales (9-item subscale: Bhow often have you had trouble sleeping[ and 6-item subscale: Bhow often have you used the following substances to help you get to sleep[) from the Pittsburgh Sleep Quality Index (PSQI), which is a 19-item well-validated self-rated questionnaire for evaluating subjective sleep quality over the previous month19 (Cronbach_s ! = .83). We developed a third 8-item subscale to assess Bhow often has it been difficult to do the following things because you were fatigued[ (internal consistency and reliability coefficient = .85). Q3 Instrument: The Occupational Fatigue Ex- haustion Recovery (OFER15) Scale is a self-report questionnaire of 15 questions, which form 3 sub- scales: chronic fatigue, acute fatigue, and intershift recovery, respectively. The OFER Scale produces comparable scores between 0 and 100 for each subscale, with cut-points into levels of low, low/ moderate, moderate/high, and high on each subscale used to compute quartiles of scale score distribution. The subscales have high internal reliability (9.84) and face, construct, and discriminant validity.20 Timed cognitive performance was measured by the speed and accuracy for 3 weight-based medication calculations that are frequently performed in emer- gency nursing practice. The first 2 medication ques- tions required calculation of the initial bolus and the total dose for a thrombolytic medication order for an older adult patient with a diagnosis of ischemic stroke. The 3rd medication question required calculation of
  • 9. the 1st dose of an antibiotic for a pediatric patient with a diagnosis of strep throat. Survey participants were instructed to complete the survey in 1 sitting and without interruption. This was done so that we could determine the speed and accuracy of the medication calculations in relation to their perceived state of fatigue at that time. The online survey software recorded start and stop times for the medication calculations and for completion of the questionnaire. Seven people were eliminated from the study sample because their response times were extreme outliers. All results were scored and compiled in an SPSS database (version 22; Armonk, New York) for analysis. Predictors Predictors were selected because of a presumed impact of work fatigue on cognitive performance. Interval- scaled predictors included the standardized items (based on analytic sample norms) from each of the 3 instruments used in this study. We examined 29 categorical predictors including work schedules (total hours in the past 30 days), shift types (length Table 1. Participants" Demographics (n = 1506) Percentage of Survey Respondents Gender Male 15.5 Female 84.5 Intersex 0.1 Missing 0
  • 10. Age 18-24 2.0 25-34 23.0 35-44 24.0 45-54 24.9 55-64 25.0 Q65 1.1 Missing 0 Primary ED role Staff nurse 68.9 Charge nurse 16.3 Case manager 0.1 Clinical coordinator 1.8 Clinical educator 2.7 Clinical nurse specialist 0.6 Director 1.4 Manager 3.1 Nurse practitioner 1.6 Trauma coordinator 0.8 Other 2.7 Missing 0 Years of experience Mean (SD) In nursing 17.5 (12.5) In emergency nursing 12.8 (10.1) In current ED 8.2 (8.4) In all areas of emergency care, excludingnursing (eg, tech, etc) 5.9 (9.3) Table 2. Facility Characteristics Percentage of Survey Respondents
  • 11. ED patient population General ED 86.0 Adult only 9.4 Pediatric only 4.6 Missing 0 Facility type Nongovernment, not-for-profit 69.0 Investor owned, for-profit 18.8 State or local government 9.4 Federal government/VA/military 2.9 Missing 0 ED geographic location Urban 39.9 Suburban 34.9 Rural 25.2 Missing 0 JONA � Vol. 47, No. 1 � January 2017 43 Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved. and time of day), sleep quality, and other life stressors that could potentially contribute to fatigue (eg, 2nd job, primary caregiver of children, and/or dependent adults). Interval-scaled predictors included 14 survey items regarding self-perceptions of fatigues, sleepiness, and demographic characteristics such as age and year of emergency nursing experience. Linear predictors were standardized so that all effect estimates refer to the impact of a 1 standard deviation change. Estimates
  • 12. for 2 interval-scaled predictors were also obtained for untransformed scores. Data Analysis Correlational analyses were performed using speed and accuracy of the medication dosage calculations as the dependent variable. Speed and accuracy data were examined via 7 statistical models: OLS regres- sion model predicting time in minutes on the page; Cox regression model predicting time to fully correct response (3/3 questions); Cox regression model predict- ing time to partially correct response (2/3 questions); 3 logistic regression models predicting the probability of a correct response for each individual medication dosage calculation; and a polytomous logistic regres- sion (PLUM) model predicting the number of correct responses (of 3). In each of 7 different statistical models, zero- order relationships (ie, simple correlations or simple contrasts of group vs full sample) between each pre- dictor and the dependent variable (time and accuracy of response) were examined with appropriate inferen- tial tests (relative ratio, odds ratios, Wald z tests, P values). Probability estimates were calculated for each group and for the full sample. Inferential tests con- trasted each group_s estimated probability of a correct response to the medication calculation versus all other groups combined (ie, contrasting each group versus the full sample) and results were reported with associated Wald z tests and P values. Results Descriptive Statistics
  • 13. In this sample of 1506 participants who provided valid responses on all items, it took an average of 21.6 minutes to complete the 34 items in the online questionnaire. Cog- nitive performance was measured by 3-timed medica- tion dosage calculations (see Table, Supplemental Digital Content 1, http://links.lww.com/JONA/A499). Overall, respondents averaged 3.78 minutes to com- plete the problem set and the average number of cor- rect answers was 1.95 of 3. More specifically, the percentages with 0, 1, 2, or 3 correct answers were 11.2% (n = 168), 17.4% (n = 262), 36.5% (n = 549), and 35.0% (n = 527), respectively. Work Schedules The primary work schedule for this group of nurses consisted of 12-hour shifts (74%), with a mean shift length of 11 T 2 hours and an average of 152 T 50 hours worked in the preceding 30 days. Survey data indicate that the mean number of shifts worked in that period was 13 T 4, with 30% of the nurses working all those shifts consecutively and 65% working at least some consecutive shifts. The re- ported numbers of extended work shifts ranged from 0 (39%), 1 to 3 (30%), 4 to 10 (25%), and 11 to 24 (5%). The primary reason given for working an extended shift was to meet patient care needs (47%). Sleep, Fatigue, and Cognitive Performance Study participants reported varying levels of sleepi- ness, sleep disturbance, and fatigue as measured by their responses on the 3 scaled instruments. Most nota- bly, 4 of every 10 nurses reported levels of daytime sleepiness above the upper limit of normal (an ESS
  • 14. score of Q10; sample mean, 9.5). In addition, most nurses reported moderately high (60-75) to high (975) levels of fatigue, with 50% of chronic and 75% of acute subscale scores falling between 60 and 100 (Figure 1). Roughly half (51%) of participants also had low to low/moderate scores on intershift recovery (score of 0-50), indicating that they are vulnerable to developing chronic or persistent fatigue. Thirty-five percent of respondents rated their sleep quality as bad or fairly bad during the preceding 30 days; 26.8% reported that they slept an average of 5 hours or less per night and used various over-the- counter or prescribed medications, herbal remedies, and alcohol as sleep aids. A substantial number of nurses reported that their fatigue resulted in occasional or frequent difficulties with activities of daily living, such as driving (38.1%), eating regular meals (65.1%), exercising (66%), managing stress 76.3%), and attend- ing to personal (67%) and family (69.6%) needs (Table 3). Nearly half (46.8%) of study participants reported that their fatigue made it difficult to pro- vide safe patient care at least some of the time. Figure 1. Reported scores for chronic and acute fatigue. 44 JONA � Vol. 47, No. 1 � January 2017 Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved. http://links.lww.com/JONA/A499 Inferential Statistics
  • 15. Seven different statistical models were used to examine zero-order relationships between each of the predictors and the dependent variable (speed and accuracy of response). Analysis of the interval-scaled predictors for sleep patterns, sleep quality and fatigue (ESS, modified PSQI, OFER15) did not detect any significant zero- order effects within any of the 7 models (Table 4). Nurses_ work schedules, caregiver status, and working a 2nd job did show a significant effect on cognitive performance. Nurses who worked the 7 AM to 7 PM shift (n = 511) showed significantly poorer response accuracy on several indicators (Table 5). These sub- jects had a 25% lower probability (time-adjusted) of a fully correct response set versus other nurses (mean, 1.87 vs 1.95; odds ratio [OR], 0.78; z = j2.45, P = .14). They were also more likely to give an incorrect answer for the pediatric dose calculation (mean, 41.3% vs 47.3%; z = j3.36, P = .001). In contrast, nurses who worked the 7 PM to 7 AM shift (n = 418) had better time-adjusted accuracy estimates based on the 2 Cox regression models. Their probability of generating a fully correct response was 1.27 times greater (z = 2.48, P = .013). Similar effects were found for subjects with a 2nd part-time or full-time job (n = 426) and for those who were primary caregivers of children (n = 541), with both groups completing the problem set faster and more accurately than those with no additional job or caregiver responsibilities. Discussion Based on the existing body of evidence, we hypoth- esized that ENs_ sleep pattern, sleep quality, and Table 3. Activities of Daily Living (ADL): Functional Impact of
  • 16. Fatigue (Modified PSQI Subscale) In the past month, how often has it been difficult for you to do the following things because you were fatigued? (valid percent; internal reliability and consistency coefficient = .85) Activity Never Difficult, % Sometimes Difficult, % Frequently Difficult, % Always Difficult, % Engage in social activities 14.8 46.9 28.1 10.2 Manage stress 17.5 52.9 23.4 6.2 Attend to family needs 25.8 48.2 21.4 4.6 Eat regular meals 21.9 35.7 29.4 13.0 Provide safe patient care 52.7 43.0 3.8 0.5 Safely operate a motor vehicle 61.2 33.8 4.3 0.7 Exercise 10.8 32.4 34.0 22.8 Attend to personal needs 27.6 45.4 21.6 5.4 Table 4. Effect of Sleep and Fatigue on Responses to Medication Problem Set: 7 Statistical Models for Interval Scale Predictorsa (n = 1506) DV1: Correlation With Time (Minutes to Complete Problem Set) DV2: RR of Fully Correct Response (3/3) DV3: RR
  • 17. of Partially Correct Response (2/3) DV4: % Correct (Activase Initial) DV5: % Correct (Activase Total) DV6: % Correct (Amoxicillin 1st Dose) DV7: Number Correct (1-3) r RR RR OR OR OR OR Daytime sleepiness and fatigue Daytime sleepiness 0.00 1.02 1.00 1.06 0.96 1.01 1.02 Chronic fatigue 0.04 0.93 0.95 0.95 0.97 0.95 0.95 Acute fatigue j0.01 1.02 1.02 0.97 1.02 1.00 1.00 Persistent fatigue 0.01 1.01 0.99 1.02 0.98 1.03 1.01
  • 18. ADL Functional Impact Scale j0.03 1.05 1.04 0.99 0.95 1.06 1.01 Sleep patterns and quality Average hours of sleep j0.02 1.02 1.02 0.98 0.97 1.02 0.99 Average hours of sleep (not standardized) j0.02 1.02 1.02 0.98 0.97 1.02 0.99 Sleep quality j0.03 1.03 1.04 1.04 1.03 1.01 1.02 Sleep quality (not standardized) j0.33 1.05 1.06 1.07 1.04 1.01 1.03 Abbreviations: OR, odds ratio; RR, relative risk. aNo significant deviations versus full sample for r, RR, or OR estimates were detected. JONA � Vol. 47, No. 1 � January 2017 45 Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved. fatigue would affect their performance on timed tests of cognitive skills that are commonly required in EN practice. Descriptive and inferential analyses performed on this data set describe frequent sleep loss, poor sleep quality, and difficulty with activities of daily living due
  • 19. to fatigue (Table 3). Twelve-hour work shifts were the norm among our study participants (74% of reported shifts), with an average shift length of 11 hours. Thus, any extension of work schedules places these nurses at increased risk of potential harm to patients and themselves.8-11 Of particular concern is the finding that nearly half (46.8%) of study participants reported that their fatigue made it difficult to provide safe patient care at least some of the time. Previous researchers have reported higher error rates among nurses who worked rotating shifts21 and night shifts.13 In contrast, nurses in our study who worked the 7 AM to 7 PM day shift showed signifi- cantly poorer response accuracy when compared with nurses who worked any other shift (Table 5). Participants who reported having specific stressors (ie, being a primary caregiver or working a 2nd full or part-time job in addition to their ED employment) answered the problem set with greater speed and accuracy than did those who did not have those res- ponsibilities. These unexpected findings stimulate a number of alternative hypotheses that have been raised in the literature and are worth further consideration. Effects of Job Demands and High-Stress Environments There is a substantial body of literature on the rela- tionship between job performance, fatigue, and ex- posure to repetitive, high levels of stress without adequate recovery between episodes.9,13-24 Our sample of ENs reported high levels of acute fatigue, low intershift recovery, and difficulties with manag- ing their daily routine (eg, eating regular meals, driv-
  • 20. ing safely, providing safe patient care), consistent with previous research that suggests that workers Table 5. Effect of Shift Type on Responses to Medication Problem Set: 7 Statistical Models for Categorical Predictors Survey question: During the past month, on which shift did you primarily work in your ED? (n = 1506) DV1: Time in Minutes to Complete Problem Set DV2: Relative RiskVFully Correct Response (3/3) DV3: Relative RiskVPartially Correct (2/3) n Mean t P RR Wald z P RR Wald z P 7 AM-3 PM 98 3.82 0.20 .842 1.07 0.38 .706 1.09 0.73 .463 7 AM-7 PM 511 3.90 1.36 .174 0.75 j3.04 .002 0.89 j1.85 .065 7 PM-7 AM 418 3.58 j1.94 .052 1.27 2.48 .013 1.15 2.06 .040 11 PM-7 AM 21 4.30 1.00 .316 0.45 j1.59 .112 0.71 j1.21 .226 11 AM-11 PM 136 3.63 j0.76 .446 1.08 0.54 .587 1.10 0.88 .380 3 PM-11 PM 31 3.61 j0.39 .694 1.81 2.40 .016 1.12 0.52 .606 3 PM-3 AM 51 3.67 j0.31 .758 0.96 j0.15 .883 0.93 j0.40 .687 DV4: % Correct (Activase Initial) DV5: % Correct (Activase Total) DV6: % Correct
  • 21. (Amoxicillin 1st Dose) n % Wald z P % Wald z P % Wald z P 7 AM-3 PM 98 78.6 1.19 .236 79.6 1.19 .233 48.0 0.13 .900 7 AM-7 PM 511 72.8 j0.40 .686 73.2 j0.84 .403 41.3 j3.36 .001 7 PM-7 AM 418 74.2 0.39 .694 76.1 0.87 .385 49.5 1.05 .294 11 PM-7 AM 21 66.7 j0.70 .481 61.9 j1.32 .188 42.9 j0.41 .679 11 AM-11 PM 136 74.3 0.23 .819 72.8 j0.48 .632 52.9 1.37 .171 3 PM-11 PM 31 80.6 0.91 .362 74.2 j0.04 .968 64.5 1.90 .058 3 PM-3 AM 51 58.8 j2.36 .018 58.8 j2.56 .010 52.9 0.81 .416 DV7: Number of Correct Responses (Out of 3) n Mean 0, % 1, % 2, % 3, % OR Wald z P 7 AM-3 PM 98 2.04 9.6 15.7 35.9 38.8 1.19 0.92 .355 7 AM-7 PM 511 1.87 12.8 19.1 36.7 31.4 0.78 j2.45 .014 7 PM-7 AM 418 2.01 10.2 16.3 36.2 37.3 1.15 1.31 .191 11 PM-7 AM 21 1.69 16.9 22.4 35.8 24.9 0.61 j1.24 .217 11 AM-11 PM 136 2.00 10.4 16.5 36.2 36.9 1.10 0.55 .581 3 PM-11 PM 31 2.24 6.6 11.7 32.7 49.0 1.81 1.73 .084 3 PM-3 AM 51 1.73 15.8 21.7 36.1 26.4 0.66 j1.63 .102 Data in bold indicate significant deviations versus the full sample. 46 JONA � Vol. 47, No. 1 � January 2017 Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved. with similar levels of maladaptive chronic fatigue are more vulnerable to the detrimental consequences of
  • 22. work-related stress and fatigue, with adequate re- covery being a key mediating factor.24-26 Additional results from 2 Australian studies found that the psycho- logical strain that nurses experience in high-paced, demanding jobs and lower levels of fulfilling non- work activities were associated with poorer sleep quality and reduced ability to recover between shifts.27,28 Similarly, the unexpected finding that 12-hour night shift workers performed better than 12-hour day shift workers could be a function of differences in environmental stress both within and between hospitals. Possibly, the night shift manages fewer interruptions from other hospital departments and fewer distractions owing to comparatively fewer workplace and personal demands than are experienced on the day shift. Re- search suggests that fatigue, along with inadequate rest and recovery between ED shifts, may reduce ENs_ ability to be vigilant and recognize the potential for error.29 In his examination of the effects of sleep depri- vation on cognition, Killgore17 concluded that sleep loss has a differential effect on specific cognitive and emotional processes, with some indication that higher- level cognitive capacities (eg, memory, judgment, decision-making) might remain degraded despite resto- ration. The frequent extension of 12-hour shifts, inadequate time off between shifts, and constant exposure to demanding work may have contributed to difficulties with performing some nursing tasks (eg, medication calculations) within our sample of ENs, nearly half of whom reported that fatigue made it difficult for them to provide safe patient care. Variations in nurses" vigilance between day and night shifts and/or over the duration of individual shifts may have contributed to performance differ-
  • 23. ences in our sample. Surani and colleagues14 found that vigilance improved over the duration of the shift; in particular, fast reaction times were significantly shorter in floor nurses after shift than before it. The authors concluded that Bthere may also be impair- ment related to the intensive care unit (ICU) setting, where higher patient acuity requires even more vigilance,[ suggesting that the high-acuity ED envi- ronment may have an attenuating effect on ENs" job performance. Because we did not collect data on these types of parameters, we were not able to assess similar effects that could have contributed to our findings. Given the considerable costs of work-related fatigue (eg, injuries), further research is warranted using chronobio- logical objective sleep measures to more effectively evaluate the effects of sleep deprivation30 as well as recommended strategies (eg, work hour limits)31 that could improve the health and safety of the EN workforce and the patients they care for. Limitations The sample was a self-selecting group of ENs who reported on their sleep patterns and levels of fatigue; no objective measures of fatigue were collected. We also did not collect data on environmental factors that may have affected results. In addition, although the study instruments have been widely used, to our knowledge, they have not been used to measure work-related fatigue among ENsVa subgroup that reports high levels of acute and chronic fatigue that may be above those found in the general nursing population. As an example, researchers found a greater discrepancy in test-retest ESS scores among patients with possible sleep-disordered breathing than has been previously reported in studies that
  • 24. examined reproducibility only in normal subjects.32 Similarly, high levels of acute and chronic fatigue within our study population could have resulted in limited ability to detect effects of poor sleep quality and fatigue on ENs" cognitive function. Moreover, because we did not collect data on variables such as work environment, vigilance, or the timing of survey completion (eg, whether study participants completed the medication problem set during midshift, postshift, or on a day off), we can neither support nor reject the null hypothesis that work-related fatigue has an attenuating effect on ENs_ cognitive function. Conclusions A significant percentage of our sample of 1,506 ENs reported high levels of sleepiness and chronic and acute fatigue that impeded full functioning both at work and at home. Although we could not determine from this study whether levels of self-reported fatigue affect cognitive function, participants did report difficulty with providing both self-care and patient care. Other factors in the environment may contrib- ute to the effects of EN fatigue and resultant delayed, missed, or inappropriate care. Further research on the effect of ENs_ work schedules, physical and emo- tional fatigue, patterns and quality of sleep, and work- place conditions on their ability to safely and effectively perform their jobs in the high-demand environment of the ED is required. There is compelling evidence to suggest that fatigue reduction interventions could contribute to overall improvements in the delivery of care, including reduction in medical errors.31 Nurse administrators may consider a fatigue management reduction system as described by Lerner et al in the
  • 25. guidance statement of the American College of Occu- pational and Environmental Medicine (ACOEM). The ACOEM, the Canadian Nurses Association, and the American Nurses Association33-35 offer specific sug- gestions to recognize and mitigate fatigue, including limiting weekly and consecutive work hours (eg, no JONA � Vol. 47, No. 1 � January 2017 47 Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved. more than 40 hours in a 7-day period and limit work shifts to 12 hours in a 24-hour period)35; develop- ing processes to document fatigue in the workplace and its relationship to overtime, maximum hours worked per day and per week, on-call hours, and data related to patient error, staff retention levels, and recruitment results; developing policies that provide time and space for rest periods, meals, and other health promotion initiatives for sleep hygiene; educating nursing staff and management in recognizing and managing fatigue in self and others, to include understanding the science of sleep, the risks associated with fatigue, and approaches to circadian rhythm disturbances; and providing sleep facilities to enable nurses to minimize their circadian disruptions during evening and night shift work. References 1. Braver ER, Preusser CW, Preusser DF, Baum HM, Beilock R,
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  • 29. 193-213. 20. Winwood PC, Lushington K, Winefield AH. Further development and validation of the Occupational Fatigue Exhaustion Recovery (OFER) Scale. J Occup Environ Med. 2006;48(4):381-389. 21. Niu SF, Chu H, Chen CH, et al. A comparison of the effects of fixed- and rotating-shift schedules on nursing staff attention levels: a randomized trial. Biol Res Nurs. 2013;15(4):443-450. doi:10.1177/1099800412445907. 22. Querstret D, Cropley M. Exploring the relationship between work-related rumination, sleep quality, and work-related fatigue. J Occup Health Psychol. 2012;17(3):341-353. doi: 10.1037/a0028552. 23. Pasupathy KS, Barker LM. Impact of fatigue on performance in registered nurses: data mining and implications for practice. J HealthcQual. 2012;34(5):22-30. doi:10.1111/j.1945-1474.2011. 00157.x. 24. Winwood PC, Winefield AH, Lushington K. Work-related fatigue and recovery: the contribution of age, domestic responsi- bilities and shiftwork. J Adv Nurs. 2006;56(4):438-449. 25. McEwen BS. Sleep deprivation as a neurobiologic and phy- siologic stressor: allostasis and allostatic load. Metabolism. 2006;55(10 suppl 2):S20-S23.
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  • 31. of 12-hour-shift nurses. Chronobiol Int. 2012;29(2):211-219. doi:10.3109/07420528.2011.645752. 31. Landrigan CP, Czeisler CA, Barger LK, et al. Effective imple- mentation of work-hour limits and systemic improvements. Jt Comm J Qual Patient Saf. 2007;33(11 Suppl):19-29. 32. Nguyen AT, Baltzan MA, Small D, Wolkove N, Guillon S, Palayew M. Clinical reproducibility of the Epworth Sleep- iness Scale. J Clin Sleep Med. 2006;2(2):170-174. 33. Lerman SE, Eskin E, Flower DJ, et al. Fatigue risk management in the workplace. J Emerg Med. 2012;54(2):231-258. 34. Canadian Nurses Association. Research Report: Nurse Fatigue and Patient Safety. Ontario,CN:Author;2010. ISBN 978-1-55119- 323-6. 35. American Nurses Association. Position statement: addressing nurse fatigue to promote safety and health: joint responsibil- ities of registered nurses and employers to reduce risks. 2014. Accessed July 21, 2016 from www.nursingworld.org. JONA � Vol. 47, No. 1 � January 2017 49
  • 32. Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved. http://www.nursingworld.org CYBR 515 Case Study – Architecture Firm. Dalton, Walton, & Carlton, Inc. is an architecture firm with approximately 250 employees in four cities in a regional area. The main office is in Kansas City, Mo, which houses 100 of the employees. The main office is located in a suburb neighborhood where physical security is not considered a concern. Their IT infrastructure is as follows: · They primarily use Microsoft servers and PCs with a number of Mac computers used to perform design work. They use Active Directory, have a Web Server for their Internet web site, four servers used as file shares (one in each office), four servers housing their architecture applications, a training server, five MS SQL database servers, and two Microsoft Exchange servers for email. · There are 20 Windows 2012 servers in the main office, twelve of which are virtualized on three physical servers. · System updates and patches are run from the main office. Most systems get Microsoft updates once a month, but some are missed. Also, most third party products (e.g., Adobe PDF & Flash) are not kept up to date. · Each satellite office has 3-4 servers for storing files and running local applications. · Each office has its own, decentralized wireless network connected to the production network. · Each employee has a desktop or laptop PC running Windows 7. HR personnel have laptops for conducting interviews. · They outsource their email spam filter and all HR applications to two separate third party companies.
  • 33. · The network sits behind a gateway router and firewall. Antivirus is in use, but is not automatically updated across the company. Employees often work remotely and only use their login and password to gain access to the corporate systems. · There is a Director of IT who has a full time staff of 5 employees, one of which does security duties part time. There are a few known issues with their IT infrastructure and organization: · Recently, a number of PCs and office equipment has been stolen out of the office. · It’s at the data owner’s discretion as to whether or not to secure their data files or folders. Many do not secure their files, while some lock them so only they have access. There have been rumors that customer data and intellectual property have been lost. · Two employees recently left your company and went to your biggest competitor, where they just landed a contract with your largest account. · Vendors are allowed access to the site and computers without authorization or supervision. · Onsite staff at each location provides IT support part time along with their other responsibilities. Password resets are done by giving out a generic password — Chiefs2017. You are an independent auditor brought in by Dalton, Walton, & Carlton’s management. They’ve tasked you with conducting an audit of their entire IT infrastructure, organization, and processed. Bellevue University CYBR 515 as of: August 2017