Table 1 Characteristics of eligible cohort members assigned exposures and those who were not assigned exposures.
Covariate | Subjects assigned exposure data N = 74,284 | Subjects with no exposure data N = 14,849 | |
|---|---|---|---|
Maternal age: Mean (SD) | 28.6 (5.2) | 28.0 (5.1) | |
Pre-pregnancy weight: Mean (SD) | 64.7 (13.7) | 66.5 (14.9) | |
Weight at delivery: Mean (SD) | 79.7 (13.9) | 81.0 (14.9) | |
Infant Gender | |||
Male | 51.0% | 50.6% | |
Female | 49.0% | 49.4% | |
Nulliparous | |||
Yes | 45.3% | 42.7% | |
No | 54.7% | 57.3% | |
Smoking at delivery | |||
Yes | 24.9% | 25.8% | |
No | 75.1% | 74.2% | |
Pregnancy complications | |||
Yes | 3.9 % | 4.1 % | |
No | 96.1 % | 95.9 % | |
Income Quintile | |||
1 | 21.6% | 17.0% | |
2 | 20.0% | 20.7% | |
3 | 19.9% | 20.2% | |
4 | 21.4% | 21.9% | |
5 | 17.1% | 20.9% | |
Urban/Rural residence | |||
Urban | 74.7% | 70.6% | |
Rural | 25.3% | 29.4% | |