Male sex | 219/402 (54.5) | 3021/6007 (50.3) | 0.104 |
5 years of age† | 394/402 (98.0) | 5889/6007 (98.0) | 0.97 |
Family composition | | | 0.21 |
Two-parent family | 368/399 (92.2) | 5577/5985 (93.2) | |
One-parent family | 28/399 (7.0) | 392/5985 (6.5) | |
Other | 3/399 (0.8) | 16/5985 (0.3) | |
Number of siblings | | | 0.095 |
0 | 71/399 (17.8) | 823/6004 (13.7) | |
1 | 193/399 (48.4) | 3203/6004 (53.3) | |
2 | 103/399 (25.8) | 1527/6004 (25.4) | |
⩾3 | 32/399 (8.0) | 451/6004 (7.5) | |
Maternal educational level‡ | | | 0.035 |
Low | 19/300 (6.3) | 205/5883 (3.5) | |
Medium | 205/300 (68.3) | 4109/5883 (69.8) | |
High | 76/300 (25.3) | 1569/5883 (26.7) | |