Table 1. Summary characteristics of the study populations.
| Case | Control | ||
|---|---|---|---|
| Gender | Male/Female | 1977/1649 | 1916/1710 |
| Age (years) | Mean (SD) | 57.94 (7.40) | 56.90 (7.96) |
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.