| | N (%) | 3–5 years | 6–10 years | p-value |
|---|
| Age |
| 3–5 years | 2397 (28.4) | N.A. | N.A. | N.A. |
| 6–10 years | 6033 (71.6) | N.A. | N.A. | N.A. |
| Gender |
| Males | 4280 (50.8) | 1238 (51.6) | 3042 (50.4) | 0.30 |
| Females | 4150 (49.2) | 1159 (48.4) | 2991 (49.6) |
| SEP |
| Low | 1800 (24.9) | 476 (22.6) | 1324 (25.9) | 0.01 |
| Medium | 2705 (37.5) | 813 (38.6) | 1892 (37.0) |
| High | 2714 (37.6) | 817 (38.8) | 1897 (37.1) |
- Legend. SES: socioeconomic position was calculated by father education level - low (less than 9 years), medium (10 to 12 years), high (university degree); p-values calculated by Chi-Square Tests
