| Age category (years) | Male (N = 144) | Female (N = 150) | Total (N = 294) |
| n (%) | n (%) | n (%) | |
| 2 - 5 | 44 (30.5) | 36 (24.0) | 80 (27.2) |
| 6 - 9 | 42 (29.2) | 37 (24.7) | 79 (26.9) |
| 10 - 14 | 40 (27.8) | 48 (32.0) | 88 (29.9) |
| 15 - 17 | 18 (12.5) | 29 (19.3) | 47 (16.0) |