Background characteristics of the very preterm or very low birthweight children and children from the Dutch general population*
| VP/VLBW cohort | General population | p Value | |
|---|---|---|---|
| VP/VLBW, very preterm or very low birthweight. | |||
| *The number of children on whom data were available varied by background characteristic. | |||
| †Remaining 2% at least 4 years and 10 months. | |||
| ‡Low, primary school or less (maximum 8 years); medium, high school or technical and vocational training for 12–16 years; high, technical and vocational training for >16 years (including university). | |||
| 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) | |