Association between trial registration and positive study findings: cross sectional study (Epidemiological Study of Randomized Trials-ESORT).
To assess whether randomised controlled trials (RCTs) that were registered were less likely to report positive study findings compared with RCTs that were not registered and whether the association varied by funding source.
Cross sectional study.
All primary RCTs published in December 2012 and indexed in PubMed by November 2013. Trial registration was determined based on the report of a trial registr...
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