TABLE 1—
Sociodemographic Characteristics of Adolescents: Boston Youth Study, 2008
| Covariate | No. (%) |
| Gender | |
| Female | 765 (56.1) |
| Male | 599 (43.9) |
| Age, y | |
| 14 | 114 (8.3) |
| 15 | 272 (19.9) |
| 16 | 368 (27.0) |
| 17 | 367 (26.9) |
| 18 | 187 (13.7) |
| 19 | 56 (4.1) |
| Race/ethnicity | |
| White | 150 (11.5) |
| Black | 598 (46.0) |
| Asian | 109 (8.4) |
| Hispanic | 350 (26.9) |
| Other | 93 (7.2) |
| Immigrant status | |
| US-born | 974 (71.4) |
| Immigrant ≤ 4 y | 114 (8.4) |
| Immigrant > 4 y | 276 (20.2) |
| Perception of neighborhood safety | |
| Unsafe | 170 (12.5) |
| Sometimes safe | 620 (45.5) |
| Always safe | 574 (42.1) |
| Social cohesion—student reported | |
| Low | 552 (40.5) |
| Moderate | 403 (29.6) |
| High | 409 (30.0) |
| Physically inactive | |
| No | 1036 (76.0) |
| Yes | 328 (24.0) |
Note. The sample size was n = 1364.