Table 1. Baseline characteristics of individuals with and without neurodevelopmental disorders in ALSPAC.
| Group/ characteristics | Neurodevelopmental disorder |
No neurodevelopmental disorder |
|---|---|---|
|
| ||
| Total number | 487 | 7,733 |
|
| ||
| Age at PE, mean (SD) in years | 12.90 (0.26) | 12.87 (0.21) |
|
| ||
| Male (%) | 65.9 | 49.6 |
|
| ||
| British White (%) | 98.9 | 98.3 |
|
| ||
| Father’s Social class (%) | ||
| I | 14.6 | 12.8 |
| II | 42.7 | 35.8 |
| III non manual | 10.3 | 11.8 |
| III manual | 23.3 | 28.6 |
| IV | 6.2 | 8.3 |
| V | 2.9 | 2.5 |
| Armed forces | 0.0 | 0.2 |
|
| ||
| Maternal education (%) | ||
| Secondary school | 9.8 | 14.2 |
| Vocational | 7.0 | 8.7 |
| O level | 36.5 | 35.3 |
| A level | 28.2 | 25.6 |
| Degree | 18.4 | 16.2 |