Table 1.
Cohort | Sample size | Mean Age (interview) | Range Age | Mean AFB | Range AFB |
---|---|---|---|---|---|
EGCUT | 1660 | 67.3 | 45–101 | 24.8 | 15–46 |
LifeLines | 5344 | 53.1 | 27–93 | 26.7 | 16–43 |
STR | 3262 | 58.2 | 45–86 | 25.1 | 14–52 |
TwinsUK | 1981 | 55.4 | 25–86 | 25.7 | 14–44 |
Abbreviation: AFB, maternal age at first birth. EGCUT, the Estonian Genome Center Biobank, University of Tartu. STR, the Swedish Twin Registry.