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.
Formal random-effects meta-analysis of the principal analysis (green denotes significantly more common in the placebo arm, amber denotes no significant difference between arms, and red significantly more common in the active drug arm). The proportion of symptoms non-pharmacological has been shown alongside this analysis (see Methods for calculation of this value).
