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How to practice EBM: Finding the Evidence. Owen Coxall & Nia Wyn Roberts Bodleian Health Care Libraries. Session objectives. Formulate a focused question Turn a focused question into a search strategy Search PubMed. Formulate a focused question. P atient / P roblem / P opulation
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How to practice EBM:Finding the Evidence Owen Coxall & Nia Wyn Roberts Bodleian Health Care Libraries
Session objectives • Formulate a focused question • Turn a focused question into a search strategy • Search PubMed
Formulate a focused question Patient / Problem / Population Intervention Comparison Outcome
Focused question P: Pregnant smokers I: nicotine replacement C: N/A O: cessation Is nicotine replacement therapy an effective and safe smoking cessation treatment in pregnant women?
Hands-on • Formulate a focused question • Use your own question or one of the examples in your pack • Record the search terms you’re using
Run a full search strategyWhy bother? • Too few results • Too many results • Irrelevant results • Submitting a funding proposal • Writing a guideline • Conducting a systematic review
Combine terms withOR smoking Smoking OR tobacco – either term can be present tobacco
Combine terms withAND Smoking AND cessation – both terms must be present smoking cessation
Quick tips • Take a common word stem and look for spelling variations e.g. • smok* - will retrieve papers smoking, smoker, smokers… but also smoked salmon • Phrase searching • Use double quote marks if you want words to appear next to each other e.g.“smoking cessation”
Develop a search strategy • pregnan* • smoking or smoker* • nicotine replacement OR nicotine patch* • cessation OR stop* OR quit* • 1 AND 2 AND 3 AND 4
Searching tips: PubMed Subject searching - use MeSH • Subject headings added to articles on Medline • Search the MeSH Database • See MeSH Tutorials for more information • Finding similar articles – use the ‘Related articles’ link
Help • Finding the Evidence tutorials: • EBM web-site – EBM tools – Finding the Evidencehttp://www.cebm.net • PubMed • Short online tutorials • Quick guides to PubMed – basics, MeSH search and MyNCBI http://www.nlm.nih.gov/bsd/disted/pubmed.html
Hands-on • Practice turning PICO into search strategy • Take your focused question:Run further searches on PubMedhttp://www.pubmed.gov