Table 2.
Sample characteristics.
| Variable | n = 21,699 (Unweighted Frequency) | % (Weighted Percent) (CI 95%) |
|---|---|---|
| Sex | ||
| Male | 10,640 | 50.5 (48.6–52.9) |
| Female | 11,022 | 49.5 (47.6–51.4) |
| Age | ||
| 13 years or younger | 4598 | 21.3 (20.0–23.0) |
| 14 years | 4603 | 20.7 (18.5–23.1) |
| 15 years | 4709 | 20.2 (18.6–21.9) |
| 16 years | 3850 | 19.0 (17.0–21.3) |
| 17 years or older | 3928 | 18.8 (16.7–20.9) |
| School grade | ||
| Form 1 | 4488 | 21.1 (19.1–23.2) |
| Form 2 | 4574 | 20.5 (18.0–23.3) |
| Form 3 | 4756 | 20.0 (18.1–22.1) |
| Form 4 | 3827 | 19.2 (16.9–21.8) |
| Form 5 | 3871 | 18.3 (16.3–20.6) |