Identification of additional trials in prospective trial registers for Cochrane systematic reviews

Ref ID 572
First Author W. A. van Enst
Journal PLOS ONE
Year Of Publishing 2012
URL https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0042812
Keywords Cochrane
Grey literature
General medical
Searching
Problem(s) Lack of supplementary searches beyond databases
Insufficient literature searches
Number of systematic reviews included 210
Summary of Findings Searching trial registries was the 3rd most common strategy for identification of unpublished studies, occurring in 38.1% of Cochrane reviews. In in 55% of the searches in prospective registers, redundant work was performed by searching a portal and a register that is already incorporated by the portal.
Did the article find that the problem(s) led to qualitative changes in interpretation of the results? Not Applicable
Are the methods of the article described in enough detail to replicate the study? Yes