Table 2.
Maternal and fetal characteristics
| n | Median (IQR) or n (%) | |
|---|---|---|
| Maternal characteristics | ||
| Age at delivery (yr) | 356 | 31.6 (5.3) |
| Height (cm) | 355 | 164 (8.2) |
| Weight (kg) | 355 | 63.5 (13.1) |
| BMI (kg/m2) | 355 | 23.7 (4.6) |
| Parity | 357 | |
| Nullipara | 211 (59.1%) | |
| Multipara | 146 (40.9%) | |
| Smoking | 353 | |
| Yes | 48 (13.6%) | |
| No | 305 (86.4%) | |
| Alcohol | 357 | |
| ≤4 U/wk | 267 (74.8%) | |
| >4 U/wk | 90 (25.2%) | |
| Strenuous exercise | 357 | |
| Yes | 84 (23.5%) | |
| No | 273 (76.5%) | |
| Season at ultrasound | 352 | |
| Winter | 160 (45.5%) | |
| Summer | 192 (54.5%) | |
| TSF (mm) | 347 | 19.9 (7.9) |
| Maternal 25(OH)D (nmol/liter) | 357 | 63 (42) |
| Fetal characteristics | ||
| FL (mm) | 357 | 64.3 (3.6) |
| PMD (mm) | 357 | 13.6 (1.8) |
| MSD (mm) | 357 | 7.00 (1.1) |
| FV (ml) | 357 | 4.86 (1.21) |
| Gestation at delivery (wk) | 356 | 40.3 (2.0) |
| Birth weight (g) | 356 | 3444 (628) |
| BMC (g) | 203 | 61.53 (18.44) |
| BMD (g/cm2) | 203 | 0.5249 (0.033) |
Height, weight, and BMI were measured before conception. Smoking and alcohol consumption were documented at 11 wk. Strenuous exercise, TSF, and 25(OH)D levels were assessed at 34 wk. FL, PMD, MSD, and FV were measured by 3D ultrasound at 34 wk. BMC and BMD were assessed by DEXA within 2 wk after birth. IQR, Interquartile range.