Populations | Variable | Crude Model | Adjusted Model |
|---|
OR (95% CI) |
P
| OR (95% CI) |
P
|
|---|
Total | ART | 1.55 (1.51–1.60) | < 0.001 | 1.42 (1.37–1.46) | < 0.001 |
Age < 35 years | ART | 1.54 (1.46–1.62) | < 0.001 | 1.43 (1.36–1.51) | < 0.001 |
Age ≥ 35 years | ART | 1.50 (1.44–1.56) | < 0.001 | 1.50 (1.43–1.57) | < 0.001 |
Primipara | ART | 1.37 (1.32–1.42) | < 0.001 | 1.43 (1.37–1.49) | < 0.001 |
Multipara | ART | 1.50 (1.42–1.58) | < 0.001 | 1.50 (1.41–1.58) | < 0.001 |
- Note: OR, odds ratio; 95%CI, 95% confidence interval; crude model, univariate logistic regression model; adjusted model, multivariate logistic regression model adjusted for maternal age at delivery (not in age subgroups), race of mother, educational level of mother, marital status, age of father, race of father, educational level of father, smoking before pregnancy, smoking during pregnancy, total number of prenatal care visits for this pregnancy, pre-pregnancy BMI, pre-pregnancy chronic diabetes, gestational diabetes, clinical chorioamnionitis or maternal fever during labor, previous preterm births, previous cesarean section, parity (not in parity subgroups), and gestational weight gain
