Table 1.
Description of maternal and infant variables
| Trait | Mean | SD | Range |
|---|---|---|---|
| Mother | |||
| Age (y) | 26.6 | 5.5 | 19–42 |
| Weight (kg) | 65.5 | 10.6 | 40–100 |
| Height (cm) | 157.9 | 6.1 | 144–175 |
| BMI (kg/m2) | 26.2 | 3.9 | 16–42 |
| Conjugate diameter (cm) | 24.0 | 2.2 | 18–31 |
| Inter-spinous diameter (cm) | 20.2 | 2.5 | 14–26 |
| Inter-cristal diameter (cm) | 20.5 | 2.4 | 15–29 |
| Neonate | |||
| Gestational age (weeks) | 39.0 | 1.2 | 37–42 |
| Birth weight (g) | 3150 | 488 | 2000–4350 |
| Birth length (cm) | 48.1 | 2.2 | 41–54 |
| Birth thorax girth (cm) | 32.7 | 2.1 | 26–45 |
| Birth head girth (cm) | 34.5 | 1.7 | 31–46 |
SD, standard deviation.