| Age (in month) | Cases (%) | Controls (%) |
| Mean (SD) | 8.97 (3.65) | 7.97 (1.44) |
| Age in month |
|
|
| 7 - 12 | 91 (74.5%) | 117 (95.9%) |
| 13 - 24 | 31 (25.5%) | 5 (4.1%) |
| Sex |
| |
| Male | 79 (64.8) | 43 (35.2) |
| Female | 65 (53.3) | 57 (46.7) |