Table 2.
Cohort Descriptive Statistics of Total Sample Size and Parental Age in Current Study
| Cohort | N | Maternal age at child's birth child | Paternal age at child's birth child | ||
|---|---|---|---|---|---|
| Range | M (SD) | Range | M (SD) | ||
| Gen‐R | 4,769 | 16.56–46.85 | 31.68 (4.79) | 17.61–68.67 | 34.24 (5.58) |
| NTR | 25,396 | 17.36–47.09 | 31.35 (3.95) | 18.75–63.61 | 33.76 (4.71) |
| RADAR‐Y | 497 | 17.80–48.61 | 31.38 (4.43) | 20.34–52.52 | 33.70 (5.10) |
| TRAILS | 2,230 | 16.34–44.88 | 29.32 (4.58) | 18.28–52.09 | 31.99 (4.71) |
Gen‐R = generation R; NTR = Netherlands Twin Register; RADAR‐Y = Research on Adolescent Development And Relationships—Young cohort; TRAILS = TRacking Adolescents' Individual Lives Survey.