Table 1 Characteristics of study participants (N = 2637)
| Study variables | N (%) |
|---|---|
| Grade | |
| Intermediate school | 1662 (63) |
| High school | 975 (37) |
| Gender | |
| Male | 996 (37.8) |
| Female | 1641 (62.2) |
| Father’s education level (N = 2343) | |
| No/school education | 1157 (49.4) |
| University education | 1186 (50.6) |
| Mother’s education level (N = 2391) | |
| No/school education | 1395 (58.3) |
| University education | 996 (41.7) |
| Age (years) | Mean ± SD |
| 14.52 ± 1.78 |