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- Title
Does the inclusion of grey literature influence estimates of intervention effectiveness reported in meta-analyses?
- Authors
McAuley, L; Pham, B; Tugwell, P; Moher, D
- Abstract
The inclusion of only a subset of all available evidence in a meta-analysis may introduce biases and threaten its validity; this is particularly likely if the subset of included studies differ from those not included, which may be the case for published and grey literature (unpublished studies, with limited distribution). We set out to examine whether exclusion of grey literature, compared with its inclusion in meta-analysis, provides different estimates of the effectiveness of interventions assessed in randomised trials.
- Publication
Lancet (London, England), 2000, Vol 356, Issue 9237, p1228
- ISSN
0140-6736
- Publication type
Journal Article
- DOI
10.1016/S0140-6736(00)02786-0