Exploring changes over time and characteristics associated with data retrieval across individual participant data meta-analyses: systematic review.

ABSTRACT: Objective To investigate whether the success rate of retrieving individual participant data (IPD) for use in IPD meta-analyses has increased over time, and to explore the characteristics associated with IPD retrieval.Design Systematic review of published IPD meta-analyses, supplemented by a reflection of the Cochrane Epilepsy Group's 20 years' experience of requesting IPD.Data sources Medline, CENTRAL, Scopus, Web of Science, CINAHL Plus, and PsycINFO.Eligibility criteria for study selection IPD meta-analyses of studies of all designs and all clinical areas published in English.Results 760 IPD meta-analyses which identified studies by systematic methods that had been published between 1987 and 2015 were included. Only 188 (25%) of these IPD meta-analyses

SUBMITTER: Nevitt SJ 

PROVIDER: S-EPMC5733815 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature