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.
Forest plots and details of meta-analyses for individual hypnotics and for the combination of the 4 drugs (bottom). Events were compiled infections, and Totals were for all 4 drugs. For studies with 3-way randomization of zaleplon, zolpidem, and placebo, the placebo groups were used twice (in the single-drug meta-analyses for zaleplon and zolpidem), but the grand total reflects the actual number of placebo participants.
