Table 1 Characteristics of sample (N = 2,098)
Characteristic | Our sample | Reference sample |
|---|---|---|
Age, mean ± SD | 13.7 ± 1.3 | - |
Age, % (95 % CI) | ||
- 11–14 years | 52.6 (50.5–54.8) | 35,103 (57.2) |
- 15–17 years | 47.4 (45.2–49.5) | 26,289 (42.8) |
Borough, n (%) | ||
- Lambeth | 41.2 (39.1–43.3) | 21,119 (34.4) |
- Southwark | 40.7 (38.6–42.8) | 20,345 (33.1) |
- Greenwich | 18.1 (16.4–19.7) | 19,928 (32.4) |
Gender, n (%) | ||
- Female | 44.9 (42.7–47.0) | 128,333 (50.4) |
- Male | 55.1 (53.0–57.2) | 126,224 (49.6) |
Ethnicity, n (%) | ||
- White | 30.4 (28.4–32.3) | 488,376 (57.7) |
- Black | 47.3 (45.2–49.5) | 204,708 (24.2) |
- Other | 22.3 (20.5–24.1) | 152,842 (18.1) |