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.
Participant characteristics
| Characteristic | % (n) |
| Gender | |
| Male | 51.9 (2083) |
| Female | 48.1 (1930) |
| Age | |
| 15 | 20.7 (829) |
| 16 | 56.2 (2255) |
| 17 | 23.1 (929) |
| Population density | |
| <5,000 | 6.1 (245) |
| <50,000 | 22.7 (910) |
| <500,000 | 29.9 (1199) |
| >500,000 | 41 (1646) |
| SES a | |
| Non-manual | 70.7 (2802) |
| Manual | 29.3 (1211) |
aSES = Socio-economic status. Non-manual includes professional, intermediate and junior non-manual occupations. Manual includes skilled, semi-skilled and unskilled manual occupations.
