Table 1 Prenatal, perinatal, and infant characteristics of cases and control subjects
Variables | ASD (N = 950) | Control (N = 764) | P |
|---|---|---|---|
Maternal and prenatal characteristics, N (%) | |||
 Mother’s age at birth (Years) | 28.0 (25.9, 30.0) | 28.0 (25.0, 30.3) | 0.812 |
 Parity number | 1 (1.2) | 1 (1.2) | <0.001 |
 Gravity number | 1 (1.1) | 1 (1.1) | 0.828 |
 Past miscarriage history | 315 (34.4) | 119 (18.1) | <0.001 |
 Threatened abortion | 127 (13.6) | 79 (10.6) | 0.072 |
Labor and perinatal characteristics, N (%) | |||
 Cesarean section, Infant characteristics | 491 (51.7) | 301 (39.4) | <0.001 |
 Infant’s weight at birth (kg), Median (IQR) | 3.5 (3.2,3.9) | 3.4 (3.1,3.8) | 0.001 |