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Finding the best evidence. Owen Coxall Bodleian Health Care Libraries. Session objectives. Formulate a focused question Turn a focused question into a search Search TRIP & PubMed Run an Advanced search on PubMed Cochrane Library. Formulate a focussed question.

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Presentation Transcript
slide1

Finding the best evidence

Owen CoxallBodleian Health Care Libraries

session objectives
Session objectives
  • Formulate a focused question
  • Turn a focused question into a search
  • Search TRIP & PubMed
  • Run an Advanced search on PubMed
  • Cochrane Library
formulate a focussed question
Formulate a focussed question

Patient / Problem / Population

Intervention

Comparison

Outcome

scenario
Scenario

Tom, a smoker of 20 years goes to his GP to ask for help with stopping smoking. He’s tried various methods in the past but nothing has worked so far, so asks the GP whether acupuncture might be a good option.

our pico
Our PICO

P= Smoking

I= Acupuncture

C= N/A

O= Stopping smoking

Is acupuncture an effective way of stopping smoking?

quick search demonstration
Quick search: Demonstration

TRIPwww.tripdatabase.com

PubMed Clinical Querieswww.pubmed.gov

hands on
Hands-on

Formulate a focussed question

  • Use your own question
  • Record the search terms you’re using

Run a quick search on TRIPwww.tripdatabase.com

Run a quick search on PubMed Clinical Queries www.pubmed.gov

run a full search strategy why bother
Run a full search strategy: Why bother?

Too few results

Too many results

Irrelevant results

Submitting a funding proposal

Writing a guideline

Conducting a systematic review

developing a search strategy
Developing a search strategy

Take your PICO and think about:

  • synonyms
  • using and/or
  • phrases
  • truncation
combine terms with or
Combine terms withOR

smoking

Smoking OR tobacco – either term can be present

tobacco

combine terms with and
Combine terms withAND

Smoking AND acupuncture – both terms must be present

smoking

acupuncture

phrases and truncation
Phrases and truncation

Take a common word stem and look for spelling variations e.g.

  • psycho* - will retrieve papers psychosis, psychoses, psychotic…but also psychology, psychological…

Phrase searching

  • Use double quote marks if you want words to appear next to each other e.g.“psychotic episode”
develop a search strategy
Develop a search strategy

Using OR then ANDto broaden then focus the search

and

and

searching tips pubmed
Searching tips: PubMed

Subject searching - use MeSH

  • Subject headings added to articles on Medline
  • Search the MeSH Database

Finding similar articles – use the ‘Related articles’ link

search the cochrane library
Search the Cochrane Library

International Cochrane Collaboration

>90 countries

effects of interventions

Includes:

Full-text Systematic Reviews

Abstracts to further SRs and RCTs

Available at:http://www.thecochranelibrary.com

resources
Resources

Cochrane Librarywww.thecochranelibrary.com

PubMedwww.pubmed.gov

TRIPwww.tripdatabase.com

Other sources – CEBM web-site – EBM toolswww.cebm.net

slide18
Help

Finding the Evidence tutorials:

  • http://www.bodleian.ox.ac.uk/medicine/information_skills/screencasts

PubMed

  • Short online tutorials
  • Quick guides to PubMed – basics, MeSH search and MyNCBI

http://www.nlm.nih.gov/bsd/disted/pubmed.html