Table 1.
Family demographics at the age eight years.
| Age | Mean | (SD) | Min | Max |
|---|---|---|---|---|
| Maternal | 39.1 | 4.4 | 30 | 50 |
| Paternal | 41.9 | 5.4 | 34 | 61 |
| Child (in years) | 8.0 | 0.5 | 7 | 11 |
| Parent Education | Maternal % | Paternal % | ||
| High School diploma | 5.8 | 15.4 | ||
| Some college | 14.4 | 23.0 | ||
| College degree | 45 | 40.4 | ||
| Some post-college training | 18.3 | 7.7 | ||
| Post-college degree | 16.3 | 13.5 | ||
| Family Income Level | % | |||
| <$50,000 | 11.2 | |||
| $50,000-$60,000 | 12.2 | |||
| $60,000-$70,000 | 16.3 | |||
| $70,000-$80,000 | 6.1 | |||
| $80,000-$90,000 | 10.2 | |||
| $90,000-$100,000 | 11.2 | |||
| $100,000-$150,000 | 21.4 | |||
| >$150,000 | 11.2 | |||