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 width of the horizontal line represents the 95% confidence interval (CI) of the individual studies, and the square proportional represents the weight of each study. The diamond represents the pooled odds ratio (OR) and 95% CI.
