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.
A fixed-effects model was used. A indicates the result under the dominant model (6A/6A+5A/6A vs. 5A/5A). B indicates the result under the recessive model (6A/6A vs. 5A/5A+5A/6A). The squares and horizontal line represent the study-specific OR and 95% CI. The diamond represents the pooled results of OR and 95% CI.
