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

Summerschool 2013 UMCG Pediatrics & Neuroscience Summerschool 2013 UMCG Pediatrics & Neuroscience Presentation Transcript

  • 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/library
  • Content 1. Finding Best Evidence and PubMed • Excercises • feedback 2. Impact Factors, H-Index, Top 25% .. • Excercises • feedback
  • 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
  • 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
  • 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?
  • 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
  • PICO(S) example 1: T • Dog bite antibiotics • (dog OR dogs) AND (bite OR bites) AND (antibiotic OR antibiotics OR penicillin)
  • 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 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?
  • PICO(S) example 2 P = child blunt abdominal trauma I = CT C = echography O = (diagnostic value) (S) = (diagnostische studies)
  • 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:
  • 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:
  • 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:
  • 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.rug.nl/umcg/library
  • Impact Factor  Measure for number of citations to a journal over a certain period of time  Quality?  1975- now : Journal Citation Reports
  • 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
  • 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) 2012 Ranking: 161 / 290 = 0.55  Outside top 25%
  • MOLECULAR IMMUNOLOGY 2nd Category: IMMUNOLOGY Ranking based on impact: 35 / 121 = 0.29 (history) • 2012 Ranking: 81 / 135 = 0.60  Also outside top 25%!
  • 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  influence of “spikes” Manipulation IF does not say anything about individual article
  • 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
  • Output scientists  bookchapters, thesis  patents  conference proceedings  articles in peer-reviewed journals  number of publicaties (in top 25%)  citations, citaties per article  Hirsch-index
  • Impact authors: citation analysis
  • Citation analyse  the number of publications  the number of publications in top 25% (in relevant ISI-subject categories)  the number of citations  h-index  …
  • 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
  • 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
  • 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)
  • 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)
  • 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
  • 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.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
  • Excercises
  • 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)?
  • 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?
  • 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.
  • Feedback & Questions
  • 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