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.
Distribution of participants by sex and age group.
| Age group | Total (n=2145), n (%) | Male (n=945, 44.1%), n (%) | Female (n=1200, 55.9%), n (%) |
| Children (8-12 years) | 243 (11.3) | 124 (13.1) | 119 (9.9) |
| Adolescents (13-19 years) | 374 (17.4) | 163 (17.2) | 211 (17.6) |
| Adults (20-64 years) | 1428 (66.6) | 608 (64.3) | 820 (68.4) |
| Older adults (≥65years) | 99 (4.6) | 50 (5.3) | 49 (4.1) |
