Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The number (percentage of outcome group) of reported and non-reported trials, by outcome. There was a significant reporting bias, i.e. association between trial outcome and submission of final report: χ2=7.30, df=2, P=0.023. 86 trials not resulting in any outcome are excluded.
