Table 3.
Stratification analyses by maternal age for the likelihood for total and recurrent spontaneous abortion (SA) of body mass index (BMI) at 18–20 years old in the Health Examinee Study (HEXA), 2004-20121
| BMI (kg/m2) | Maternal age | |||||
|---|---|---|---|---|---|---|
| SA at ≤25 years | SA at 26–28 years | SA at >28 years | ||||
| (N=3,980) | (N=3,977) | (N=4,321) | ||||
| N (%) | OR2 (95% CI) | N (%) | OR2 (95% CI) | N (%) | OR2 (95% CI) | |
| <18.5 | 636 (16.0) | 1.07 (0.97–1.17) | 768 (19.3) | 1.17 (1.08–1.27) | 844 (19.5) | 1.11 (1.02–1.21) |
| 18.5–22.9 | 2,765 (69.5) | 1.00 (ref) | 2,761 (69.4) | 1.00 (ref) | 2,989 (69.2) | 1.00 (ref) |
| 23–24.9 | 427 (10.7) | 1.02 (0.91–1.32) | 356 (8.95) | 0.92 (0.82–1.03) | 376 (8.7) | 0.93 (0.83–1.04) |
| ≥25 | 153 (3.8) | 1.22 (1.02–1.45) | 92 (2.3) | 0.82 (0.66–1.01) | 112 (2.6) | 0.96 (0.79–1.17) |
1Only included participants who were enrolled between 2007 and 2012 due to lack of information in age at spontaneous abortion
2Adjusted for age, education, smoking before first pregnancy and drinking status