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Finding the Evidence
It is important when searching for evidence that search terms are referred back to your original PICO question. The process of finding evidence therefore follow three key steps:
- Identify terms to fit your PICO question
- Look for secondary sources
- Search for primary sources
See our Searching Exercise page for a guide on how to complete this process.
1. Identify terms to fit your PICO question
| Patient | Intervention | Comparison | Outcome |
|---|---|---|---|
Download 'Asking Clinical Questions' - guide to constructing PICO questions
2. Look for secondary sources
- Guidelines: UK National Library for Health, NICE, SIGN; US National Guidelines Clearinghouse; Canadian Medical Association; New Zealand Guidelines Group.
- CATs: CAT Crawler
- Evidence-Based Summaries: Bandolier, Clinical Evidence
- Structured Abstracts: EBM Online, ACP Journal Club
- Systematic Reviews: Cochrane Library
- To search several of the databases simultaneously you can use: www.tripdatabase.com
3. Search for Primary Sources
Use methodological filters to target the right type of study. For instance, PubMED filters for:
- therapy
- diagnosis
- prognosis
- aetiology
Page last edited: 07 April 2009


