Table 1. Demographic characteristics of the study population (N = 258).
| Characteristics | Values | |
|---|---|---|
| Sex (male/female) | 151 (58.5)/107 (41.5) | |
| Age, yr | 10.62 ± 3.18 | |
| 6–8 | 79 (30.6) | |
| 9–11 | 81 (31.4) | |
| 12–14 | 63 (24.4) | |
| 15–18 | 35 (13.6) | |
| Onset age, mon | 12.50 (3.38–48.00) | |
| Duration of the condition, yr | 8.00 (5.00–11.40) | |
| Onset age group, yr | ||
| < 2 | 136 (58.5) | |
| 2–5 | 82 (31.8) | |
| 6–13 | 40 (15.5) | |
| ≥ 14 | 0 (0) | |
| Mode of delivery | ||
| Normal spontaneous vaginal delivery | 174 (67.4) | |
| Cesarean section | 79 (30.6) | |
| Premature birth | 7 (2.7) | |
| Feeding type | ||
| Breast milk only | 107 (41.5) | |
| Formula only | 30 (11.6) | |
| Mixed | 119 (46.1) | |
Values are presented as number (%) or mean ± SD or median (IQR).