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PubMed & Impact Factors
Summerschools 2013 Pediatrics &
NeuroScience UMCG
Central Medical Library
July 9th 2013
Your teachers this afternoon
Guus van den Brekel & Hans Froon
Email: cmb@umcg.nl
Website library: http://www.rug.nl/umcg/l...
Content
1. Finding Best Evidence and PubMed
• Excercises
• feedback
2. Impact Factors, H-Index, Top 25% ..
• Excercises
• ...
Finding best evidence & PubMed
PICO approach & Examples
PubMed Tutorials:
From NLM: http://www.nlm.nih.gov/bsd/disted/p...
PICO(S)
P : Patient or problem
I : Intervention (or risk factor, prognostic factor)
C : Control group (or absence of risk ...
Example 1
A 30 year old man attends the
emergency department after having
been bitten by a dog 4 hours
previously. He has ...
PICO(S) example 1:
P = (adults with) dog bites
I = antibiotics
C = no antibiotics/ placebo
O = incidence of wound infectio...
PICO(S) example 1:
T
• Dog bite antibiotics
• (dog OR dogs) AND (bite OR bites) AND
(antibiotic OR antibiotics OR penicill...
Boolean Operators (AND, OR, NOT)
Example 2
An 5 year-old child has crashed on his bicycle into a
car.
He suffers from abdominal pain, caused by his bike’s
...
PICO(S) example 2
P = child blunt abdominal trauma
I = CT
C = echography
O = (diagnostic value)
(S) = (diagnostische studi...
Exercises Finding Best Evidence
1.
You are interested in the effectivity of interventions (such as
cognitive therapy) aime...
Exercises Finding Best Evidence
2.
For adolescents with OCD (obsessive comp. Disorder),
which treatment is more effective ...
Exercises Finding Best Evidence
3.
Many babies that are breastfed sleep regularly part of the
night in the bed of their pa...
Feedback & Questions
Top 25%, Impact Factors
and h-index
List top 25% journals per ISI category
http://atumcg.cmb.med.rug.nl
CMB-website: www.r...
Impact Factor
 Measure for number of citations to a
journal over a certain period of time
 Quality?
 1975- now : Journa...
MOLECULAR IMMUNOLOGY
 Cites in 2008 to articles from 2007 resp 2006:
1143 + 800 = 2243 cites
Number of articles in 2007 ...
Value
Depends on ISI “Subject Category”
view journal summary list
Top 25%
MOLECULAR IMMUNOLOGY
1st
Category:
BIOCHEMISTRY & MOLECULAR BIOLOGY
Ranking based on impact: 89 / 275 = 0.32 (history)
201...
MOLECULAR IMMUNOLOGY
2nd
Category:
IMMUNOLOGY
Ranking based on impact: 35 / 121 = 0.29 (history)
• 2012 Ranking: 81 / 135 ...
Positive
 broad spectrum (9000 journals, 60 countries)
 objective (quantity)
 worldwide known
negative
 limited to ISI journals
 subject category dependent
Comparing IFs
Disadvantage specific research area
 infl...
Other measures of impact
Journal Immediacy Index (ISI)
Journal Cited Half-Life/ Journal Citing Half-Life
EigenFactor & ...
Output scientists
 bookchapters, thesis
 patents
 conference proceedings
 articles in peer-reviewed journals
 number ...
Impact authors: citation analysis
Citation analyse
 the number of publications
 the number of publications in top 25%
(in relevant ISI-subject categories)...
Databases
Peer reviewed literature:
 Web of Science (SCI + SSCI)– Thomson ISI
 (Scopus - Elsevier)
 Medline - NLM
 Emb...
Databases for citation analysis
 Web of Science– Thomson ISI
 Scopus – Elsevier (no access anymore)
Access via CMB websi...
prof. dr. D.S. Postma
Web of Science (author search)
Postma DS: 587 hits
Excluded: meeting abstracts, notes, corrections
...
prof. dr. D.S. Postma
Web of Science (advanced search)
#1 (AU=Postma DS) AND (OG=gron* OR
OG=beatr*) 529 hits
#2 AU=Postma...
Difficult author names
Multiple initials
“Tussenvoegsels”, insertion
Name changes (marriage)
Common names
Voorbeeld: ...
H-index
J.E. Hirsch (2005)
H-index = n:
author has n publications with n citations or
more
Power: less influence spikes
Publishing a lot is not rewarded,
but the publishing of
many higly-cited publications is!
Other interesting links
• Google Scholar http://Scholar.google.com
• Publish or Perish (PoP): http://www.harzing.com/pop.h...
Excercises
Exercise 1: Impact Factor
You are working on a systematic review on the prevention of obesity in
young children. You consi...
Published papers by Simone Times Cites
paper 1 (2012) 0
Paper 2 (2012) 1
Paper 3 (2011) 3
Paper 4 (2010) 5
Paper 5 (2010) ...
Exercise 3: publication and citation overview
Prof. D. Postma is a respected researcher at the department of
Pulmonology.
...
Feedback & Questions
A little extra!
Make life easier!
Use Journal Apps to keep up with
the literature.
BrowZine | Docwise | Read by QxMD
Read ...
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Summerschool 2013 UMCG Pediatrics & Neuroscience

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  • P = dog bite I = antibiotics C = no antibiotics O = incidence wound infection PubMed: dog bite AND prophylactic AND antibiotics 37 hits Dog bites AND prophylactic AND antibiotics 38 hits dog bite* AND prophylactic AND antibiotics 34 hits dog bite AND prophyl* AND antibiotics 49 hits (dog bite OR dog bites) AND prophyl* AND antibiotics
  • Voorbeeld meer fundamenteel: Overzicht van de mechanismen die verantwoordelijk zijn voor chronische diffuse pijn bij fibromyalgie. Fibromyalgie - fibromyalgia Mechanismen - mechanisms/ pathophysiology (pain processing, pain pathways, central sensitization, comorbidities) Chronische (diffuse) pijn –pain Type te includeren studies/ LIMITS? Lastig afbakenen. PMID: 17502633 [PubMed - indexed for MEDLINE] Late-life depression is one of the main health problems among elderly populations and a key element of healthy ageing. Causal relationships of lifestyle- and diet-related factors in late-life depression are unclear. PMID:17975846
  • Voorbeeld meer fundamenteel: Overzicht van de mechanismen die verantwoordelijk zijn voor chronische diffuse pijn bij fibromyalgie. Fibromyalgie - fibromyalgia Mechanismen - mechanisms/ pathophysiology (pain processing, pain pathways, central sensitization, comorbidities) Chronische (diffuse) pijn –pain Type te includeren studies/ LIMITS? Lastig afbakenen. PMID: 17502633 [PubMed - indexed for MEDLINE] Late-life depression is one of the main health problems among elderly populations and a key element of healthy ageing. Causal relationships of lifestyle- and diet-related factors in late-life depression are unclear. PMID:17975846
  • P = dog bite I = antibiotics C = no antibiotics O = incidence wound infection PubMed: dog bite AND prophylactic AND antibiotics 37 hits Dog bites AND prophylactic AND antibiotics 38 hits dog bite* AND prophylactic AND antibiotics 34 hits dog bite AND prophyl* AND antibiotics 49 hits (dog bite OR dog bites) AND prophyl* AND antibiotics
  • Voorbeeld meer fundamenteel: Overzicht van de mechanismen die verantwoordelijk zijn voor chronische diffuse pijn bij fibromyalgie. Fibromyalgie - fibromyalgia Mechanismen - mechanisms/ pathophysiology (pain processing, pain pathways, central sensitization, comorbidities) Chronische (diffuse) pijn –pain Type te includeren studies/ LIMITS? Lastig afbakenen. PMID: 17502633 [PubMed - indexed for MEDLINE] Late-life depression is one of the main health problems among elderly populations and a key element of healthy ageing. Causal relationships of lifestyle- and diet-related factors in late-life depression are unclear. PMID:17975846
  • Transcript of "Summerschool 2013 UMCG Pediatrics & Neuroscience"

    1. 1. PubMed & Impact Factors Summerschools 2013 Pediatrics & NeuroScience UMCG Central Medical Library July 9th 2013
    2. 2. Your teachers this afternoon Guus van den Brekel & Hans Froon Email: cmb@umcg.nl Website library: http://www.rug.nl/umcg/library
    3. 3. Content 1. Finding Best Evidence and PubMed • Excercises • feedback 2. Impact Factors, H-Index, Top 25% .. • Excercises • feedback
    4. 4. Finding best evidence & PubMed PICO approach & Examples PubMed Tutorials: From NLM: http://www.nlm.nih.gov/bsd/disted/pubmed.html •Intro (What is PubMed), •term mapping, •Boolean operators, •MeSH, •textwords, •filters
    5. 5. PICO(S) P : Patient or problem I : Intervention (or risk factor, prognostic factor) C : Control group (or absence of risk factor, progn.factor) O : Outcome (S): Study type Categories: therapy, diagnosis, etiology, prognosis
    6. 6. Example 1 A 30 year old man attends the emergency department after having been bitten by a dog 4 hours previously. He has puncture wounds and a 1 cm laceration on his forearm. His wounds are thoroughly cleaned and a dressing has been applied. Question: Do you need to prescribe antibiotics?
    7. 7. PICO(S) example 1: P = (adults with) dog bites I = antibiotics C = no antibiotics/ placebo O = incidence of wound infection S = randomized controlled trial •Find search terms and synomyms for every section when needed •Build your search strategy with Boolean operators
    8. 8. PICO(S) example 1: T • Dog bite antibiotics • (dog OR dogs) AND (bite OR bites) AND (antibiotic OR antibiotics OR penicillin)
    9. 9. Boolean Operators (AND, OR, NOT)
    10. 10. Example 2 An 5 year-old child has crashed on his bicycle into a car. He suffers from abdominal pain, caused by his bike’s handlebar which thumped into his abdomen. Question: What is the value of a CT-scan compared to echography in case of a child with blunt (non- penetrating) abdominal trauma?
    11. 11. PICO(S) example 2 P = child blunt abdominal trauma I = CT C = echography O = (diagnostic value) (S) = (diagnostische studies)
    12. 12. Exercises Finding Best Evidence 1. You are interested in the effectivity of interventions (such as cognitive therapy) aimed at the prevention of major depression recurrence/relapse. P = I = C = O = Type of article:
    13. 13. Exercises Finding Best Evidence 2. For adolescents with OCD (obsessive comp. Disorder), which treatment is more effective to start with: cognitive behaviour therapy, an anti-depressive agent (SSRI) or a combination of both treatments? P = I = C = O = Type of article:
    14. 14. Exercises Finding Best Evidence 3. Many babies that are breastfed sleep regularly part of the night in the bed of their parents. Since a couple of years this is strongly discouraged in guidelines to prevent cot death (Sudden Infant Death Syndrome). Can you find evidence that sleeping between the parents is a risk factor for SIDS? P = I = C = O = Type of article:
    15. 15. Feedback & Questions
    16. 16. Top 25%, Impact Factors and h-index List top 25% journals per ISI category http://atumcg.cmb.med.rug.nl CMB-website: www.rug.nl/umcg/library
    17. 17. Impact Factor  Measure for number of citations to a journal over a certain period of time  Quality?  1975- now : Journal Citation Reports
    18. 18. MOLECULAR IMMUNOLOGY  Cites in 2008 to articles from 2007 resp 2006: 1143 + 800 = 2243 cites Number of articles in 2007 resp 2006: 407 + 224 = 631  Impact Factor: 2243/ 631 = 3.555
    19. 19. Value Depends on ISI “Subject Category” view journal summary list Top 25%
    20. 20. MOLECULAR IMMUNOLOGY 1st Category: BIOCHEMISTRY & MOLECULAR BIOLOGY Ranking based on impact: 89 / 275 = 0.32 (history) 2012 Ranking: 161 / 290 = 0.55  Outside top 25%
    21. 21. MOLECULAR IMMUNOLOGY 2nd Category: IMMUNOLOGY Ranking based on impact: 35 / 121 = 0.29 (history) • 2012 Ranking: 81 / 135 = 0.60  Also outside top 25%!
    22. 22. Positive  broad spectrum (9000 journals, 60 countries)  objective (quantity)  worldwide known
    23. 23. negative  limited to ISI journals  subject category dependent Comparing IFs Disadvantage specific research area  influence of “spikes” Manipulation IF does not say anything about individual article
    24. 24. Other measures of impact Journal Immediacy Index (ISI) Journal Cited Half-Life/ Journal Citing Half-Life EigenFactor & Article Inluence Score (ISI) www.eigenfactor.org SCImago Journal & Country Rank (Scopus) www.scimagojr.com
    25. 25. Output scientists  bookchapters, thesis  patents  conference proceedings  articles in peer-reviewed journals  number of publicaties (in top 25%)  citations, citaties per article  Hirsch-index
    26. 26. Impact authors: citation analysis
    27. 27. Citation analyse  the number of publications  the number of publications in top 25% (in relevant ISI-subject categories)  the number of citations  h-index  …
    28. 28. Databases Peer reviewed literature:  Web of Science (SCI + SSCI)– Thomson ISI  (Scopus - Elsevier)  Medline - NLM  Embase - Elsevier  coverage>99.9% Other:  Repository RUG: thesis  researchers /PiCarta: book chapters
    29. 29. Databases for citation analysis  Web of Science– Thomson ISI  Scopus – Elsevier (no access anymore) Access via CMB website: http://www.rug.nl/umcg/library Access to full text & databases from home: Use your S-number or guest account
    30. 30. prof. dr. D.S. Postma Web of Science (author search) Postma DS: 587 hits Excluded: meeting abstracts, notes, corrections  511 hits (=articles, reviews, editorials, letters, proceeding papers)
    31. 31. prof. dr. D.S. Postma Web of Science (advanced search) #1 (AU=Postma DS) AND (OG=gron* OR OG=beatr*) 529 hits #2 AU=Postma D AND TS=(immu* OR asthma* OR lung* OR resp* OR pulm*) AND (OG=gron* OR OG=beatr*) 23 hits #3 (#1 OR #2) 552 hits Excluded: meeting abstracts, notes, corrections  480 hits (=articles, reviews, editorials, letters, proceeding papers)
    32. 32. Difficult author names Multiple initials “Tussenvoegsels”, insertion Name changes (marriage) Common names Voorbeeld: prof. P.E. de Jong de Jong PE; Dejong PE; Jong PED; de Jong P
    33. 33. H-index J.E. Hirsch (2005) H-index = n: author has n publications with n citations or more Power: less influence spikes
    34. 34. Publishing a lot is not rewarded, but the publishing of many higly-cited publications is!
    35. 35. Other interesting links • Google Scholar http://Scholar.google.com • Publish or Perish (PoP): http://www.harzing.com/pop.htm • AltMetrics : alternative metrics for impact: http://altmetrics.org/manifesto/ • 10 Ways to calculate your H-Index : free and otherwise http://digicmb.blogspot.nl/2013/06/ways-to-calculate-your-h- index-free-and.html
    36. 36. Excercises
    37. 37. Exercise 1: Impact Factor You are working on a systematic review on the prevention of obesity in young children. You consider to send your your manuscript to the Int J Pediatr Obes. •What is the impact factor? •Is it top25%? •What are the ISI fields of this journal? •What would be a good alternative (journal)?
    38. 38. Published papers by Simone Times Cites paper 1 (2012) 0 Paper 2 (2012) 1 Paper 3 (2011) 3 Paper 4 (2010) 5 Paper 5 (2010) 1 Paper 6 (2010) 0 Paper 7 (2009) 15 Paper 8 (2008) 3 Exercise 2: h-index A young researcher, Simone, has 8 publications. One of her papers, a review, has been cited 15 times. The sum of the times cited is 28. What is the h-index of Simone?
    39. 39. Exercise 3: publication and citation overview Prof. D. Postma is a respected researcher at the department of Pulmonology. Her initials are DS (Dirkje S. Postma). •How many publications of prof. Postma (in combination with the address field – Groningen) are found in WOS/WOK? •What is the corresponding h-index? Compare this to the number of publications in Scholar Google.
    40. 40. Feedback & Questions
    41. 41. A little extra! Make life easier! Use Journal Apps to keep up with the literature. BrowZine | Docwise | Read by QxMD Read more: http://libguides.rug.nl/medicalEjournals
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