Grey literature in systematic reviews: a cross-sectional study of the contribution of non-English reports, unpublished studies and dissertations to the results of meta-analyses in child-relevant reviews

Ref ID	684
First Author	L. Hartling
Journal	BMC MEDICAL RESEARCH METHODOLOGY
Year Of Publishing	2017
URL	https://dx.doi.org/10.1186/s12874-017-0347-z
Keywords	• Cochrane • Grey literature • Paediatrics • Language
Problem(s)	• Language restriction • Grey literature excluded
Number of systematic reviews included	129
Summary of Findings	Whilst the majority of included reviews searched for non-English studies, only 12% of reviews included non-English studies. Most reviews also searched for unpublished studies but only 6% included unpublished studies.
Did the article find that the problem(s) led to qualitative changes in interpretation of the results?	Yes
Are the methods of the article described in enough detail to replicate the study?	Yes