Completeness and changes in registered data and reporting bias of randomized controlled trials in ICMJE journals after trial registration policy.

PLoS One · 2011 · PMC3177887 · PMID 21957485

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did not reach statistical significanceno p-value reported

The number of RCTs with missing or uninformative information at initial registration decreased at the time of the last change in the registry before the publication, but this change did not reach statistical significance.

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