Linked Crash and Trauma Data Analysis

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This presentation from the Center for Transportation Safety at TTI in partnership with UT Health Science Center, Houston, and Texas A&M School of Public Health shares the results from a pilot study to link crash data and hospital data.

Health & Medicine

Linked Crash and Trauma Data
Analysis

Results from a Pilot Study
TTI – Center for Transporta=on Safety
UT Health Science Center – Houston
Texas A&M School of Public Health

Why do this?

Crash Data – Limited informa=on on
consequences

Hospital Data – Limited informa=on on
crash circumstances

Data Limita=ons
Level I
Most Serious
Harris County Drivers
2139 MVC
Pa=ents
445 CRIS
Matches
CAN’T GENERALIZE FINDINGS

Areas of Inquiry
Charges/
Costs
Alcohol Injury
Severity
TBI

KABCO Injury Scale
O
Property
Damage Only
B
Non-
Incapacita=ng
A
Incapacita=ng
K
Killed
C
Possible

Incapacita=ng
wide range
Oﬃcer
Percep=on
Brief Snapshot
at Scene
KABCO

Anatomically
Based
9
body regions
Based on Threat
to Life
AIS - Abbreviated Injury Scale
Consensus
Derived
Global

AIS - Abbreviated Injury Scale
5
Cri=cal
3
Serious
2
Moderate
1
Minor
4
Severe
6
Unsurvivable

Highest AI
Score
One Number
MAIS – Maximum Abbreviated Injury Score
3+
Severe Crashes

Incapacity Threat To Life
Capacity for
Ac=vity
Assessed by
Medical
Professionals
MAIS vs KABCO
Precision Generaliza=on

KABCO vs MAIS
0
20
40
60
80
100
120
Minor Moderate Serious Severe Cri=cal
MAIS scores for A Crashes
•  Wide range of severi=es
•  Outcomes and costs could vary greatly

KABCO vs MAIS
40%
3+ (MAIS) injuries classiﬁed
as non-incapacita=ng
or possible – B&C (KABCO)
3+ = Serious, Severe and Cri=cal threats to life

Alcohol Repor=ng
70% of pa4ents with ETOH > 80 mg/DL
Were not reported with
a posi=ve BAC test result on
crash report
ETOH of 80 = BAC of 0.08

Alcohol Repor=ng
55% of pa4ents with ETOH > 80
Alcohol involvement not
iden=ﬁed on crash report

By test or observa=on
ETOH of 80 = BAC of 0.08

TBI
38%
of pa=ents
suﬀered trauma=c brain
injuries

TBI
23
4mes
Risk of trauma=c brain injury
If not wearing
restraints

TBI
8.5
4mes
Risk of trauma=c brain injury
when
speeding

Charges / Costs
$59.5
million
Hospital Charges for Medical
445 pa=ents
$134,000
per pa=ent
Charges before discounts/nego=ated recovery

NSC
Na=onal Safety Council

Wage and produc=vity,
medical, admin, MV damage
employers’ uninsured costs

Charges vs NSC es=mates
NSC underes=mated costs by 1/3 for
injuries
N
lI
Injuries in study more severe
than A injuries in general

3+ injuries classiﬁed as B and C
Medical charges > actual recovered
cost

What did we learn?

•  Linking is Challenging, but valuable
•  Precise injury informa=on
•  Bemer cos=ng
•  Bemer investments
•  Bemer deployment
•  Possible Alcohol underrepor=ng? CAUTION

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Linked Crash and Trauma Data Analysis

1. Linked Crash and Trauma Data Analysis Results from a Pilot Study TTI – Center for Transporta=on Safety UT Health Science Center – Houston Texas A&M School of Public Health

2. Why do this? Crash Data – Limited informa=on on consequences Hospital Data – Limited informa=on on crash circumstances

3. Linking Hermann Memorial Trauma CRIS

4. Data Limita=ons Level I Most Serious Harris County Drivers 2139 MVC Pa=ents 445 CRIS Matches CAN’T GENERALIZE FINDINGS

5. Areas of Inquiry Charges/ Costs Alcohol Injury Severity TBI

6. Areas of Inquiry Injury Severity

7. Injury Severity KABCO MAIS VS

8. KABCO Injury Scale O Property Damage Only B Non- Incapacita=ng A Incapacita=ng K Killed C Possible

9. Incapacita=ng wide range Oﬃcer Percep=on Brief Snapshot at Scene KABCO

10. Anatomically Based 9 body regions Based on Threat to Life AIS - Abbreviated Injury Scale Consensus Derived Global

11. AIS - Abbreviated Injury Scale 5 Cri=cal 3 Serious 2 Moderate 1 Minor 4 Severe 6 Unsurvivable

12. Highest AI Score One Number MAIS – Maximum Abbreviated Injury Score 3+ Severe Crashes

13. Incapacity Threat To Life Capacity for Ac=vity Assessed by Medical Professionals MAIS vs KABCO Precision Generaliza=on

14. KABCO vs MAIS 0 20 40 60 80 100 120 Minor Moderate Serious Severe Cri=cal MAIS scores for A Crashes •  Wide range of severi=es •  Outcomes and costs could vary greatly

15. KABCO vs MAIS 40% 3+ (MAIS) injuries classiﬁed as non-incapacita=ng or possible – B&C (KABCO) 3+ = Serious, Severe and Cri=cal threats to life

16. Alcohol Repor=ng

17. Alcohol Repor=ng 70% of pa4ents with ETOH > 80 mg/DL Were not reported with a posi=ve BAC test result on crash report ETOH of 80 = BAC of 0.08

18. Alcohol Repor=ng 55% of pa4ents with ETOH > 80 Alcohol involvement not iden=ﬁed on crash report By test or observa=on ETOH of 80 = BAC of 0.08

19. TBI Trauma=c Brain Injury

20. TBI 38% of pa=ents suﬀered trauma=c brain injuries

21. TBI 23 4mes Risk of trauma=c brain injury If not wearing restraints

22. TBI 8.5 4mes Risk of trauma=c brain injury when speeding

23. Charges/ Costs

24. Charges / Costs $59.5 million Hospital Charges for Medical 445 pa=ents $134,000 per pa=ent Charges before discounts/nego=ated recovery

25. NSC Na=onal Safety Council Wage and produc=vity, medical, admin, MV damage employers’ uninsured costs

26. Charges vs NSC es=mates NSC underes=mated costs by 1/3 for injuries N lI Injuries in study more severe than A injuries in general 3+ injuries classiﬁed as B and C Medical charges > actual recovered cost