Table 1.
Study Population Characteristics
| Characteristic | Subcohort (n = 432) | Cases (n = 204) |
|---|---|---|
| Year of mother's birth | 1936 (9) | 1931 (11) |
| Age at first full-term pregnancy, y | 22 (5) | 24 (8) |
| Age at delivery, y | 27 (8) | 31 (11) |
| Year of blood sampling | 1962 (2) | 1962 (2) |
| Gestational day of blood sampling | 248 (23) | 246 (31) |
| Weight at first prenatal visit, kga | 58.5 (12.6) | 60.3 (12.6) |
| Height, ma | 1.63 (0.10) | 1.65 (0.08) |
| BMI at first prenatal visit, kg/m2a | 22.1 (4.3) | 22.6 (4.2) |
| Alcohol (sum of wine, beer, liquor), drinks/wka | 0.2 (0.9) | 0.2 (1.7) |
| Parity at blood sampling, % | ||
| 0 | 36 | 27 |
| 1 | 28 | 26 |
| 2 | 17 | 23 |
| ≥3 | 19 | 25 |
| Race, % | ||
| non-Hispanic white | 69 | 69 |
| African American | 20 | 19 |
| Hispanic | 2 | 1 |
| Asian | 6 | 7 |
| Mixed | 3 | 3 |
Data presented as median (interquartile range) or percentage.
Abbreviation: BMI, body mass index.
a
Sample sizes were smaller owing to missing data: subcohort: alcohol (n = 339), BMI (n = 425), height (n = 427), and weight (n = 425); cases: alcohol (n = 155), BMI (n = 200); height (n = 201); and weight (n = 201).