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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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