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.
Sociodemographic characteristics of students at baseline (N = 1,901).
| Category | Intervention | Control | Total |
|---|---|---|---|
| Age (M, SD) | 13.02 (0.93) | 13.00 (0.76) | 13.01 (0.85) |
| Sex (%) | |||
| Male | 46.9 | 44.7 | 45.8 |
| Female | 53.1 | 55.3 | 54.2 |
| School year (%) | |||
| VII | 53.9 | 51.3 | 52.7 |
| VIII | 46.1 | 48.7 | 47.3 |
