Table 3.
Association Between Father's and Mother's Age at Birth and Social Functioning in Male Adolescents
| Parental Age at Birth (y) | Normal-High Social Functioning (%) (N = 299 559) | Low Social Functioning (%) (N = 68 685) | Unadjusted OR (95% CI) | Adjusteda OR (95% CI) |
| Fathers | ||||
| Less than 20 | 0.2 | 0.4 | 1.72 (1.49–1.98) | 1.27 (1.08–1.49) |
| 20–24 | 12.3 | 11.9 | 1.05 (1.02–1.08) | 0.93 (0.9–0.96) |
| 25–29 | 37.4 | 34.5 | 1 | 1 |
| 30–34 | 27.4 | 25.9 | 1.03 (1.01–1.05) | 1.07 (1.05–1.1) |
| 35–39 | 14.0 | 15.4 | 1.2 (1.17–1.23) | 1.21 (1.17–1.25) |
| 40–44 | 6.1 | 7.8 | 1.39 (1.34–1.43) | 1.31 (1.25–1.37) |
| ≥45 | 2.6 | 4.1 | 1.71 (1.63–1.79) | 1.52 (1.43–1.61) |
| Mothers | ||||
| Less than 20 | 3.5 | 4.0 | 1.21 (1.16–1.27) | 0.9 (0.85–0.95) |
| 20–24 | 30.9 | 29.5 | 1.0 (0.98–1.03) | 0.91 (0.9–0.96) |
| 25–29 | 36.1 | 34.3 | 1 | 1 |
| 30–34 | 20.2 | 20.4 | 1.06 (1.04–1.09) | 1.06 (1.03–1.09) |
| 35–39 | 7.8 | 9.4 | 1.27 (1.23–1.31) | 1.12 (1.07–1.16) |
| ≥40 | 1.6 | 2.4 | 1.61(1.52–1.71) | 1.15 (1.07–1.24) |
a
Adjusted analyses controlled for cognitive functioning, the other parent's age, parental socioeconomic status, birth order, and draft board year of assessment. OR, odds ratio; CI, confidence interval.