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Volume
7: No. 6, November 2010
SYSTEMATIC REVIEW
Quality of Systematic Reviews of Observational Nontherapeutic Studies
This flow chart shows 3 boxes. The top box reads
Total references ?1,053
- Medline via PubMed ?904
- Related publications ?14
- WorldCat ?2
- Scirus ?28
- Manual search — 70
- Guidelines, textbooks, consensus statements — 23
- Published by the authors — 11
- Cochrane Library ?1
It is connected by a vertical line to 2 additional boxes. The left box
reads
Included studies ?397
- Systematic reviews for the present article ?145
- Tools (scales and checklists) ?96
- Working groups ?13
- Methodologic studies about bias in observational research ?143
The right box reads
Excluded studies ?656
- Ethical guidelines ?3
- Reviews ?23
- Centers for Disease Control and Prevention study ?4
- Related to interventions ?209
- Related to diagnostic studies ?54
- Not relevant to research questions ?363
Figure. Study flow to identify systematic reviews
of observational studies, scales and checklists for planned, formal internal quality
evaluation, and studies about bias in observational research.
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