Table 1.
Baseline characteristics of subjects by vitamin D supplementation group
| Characteristic | 1,000 IU/day n = 37 | 2,000 IU/day n = 36 |
|---|---|---|
| Gestational age at enrolment, week | 10.39 (1.69) | 10.08 (2.17) |
| Gestational age at last visit (week) | 34.65 (0.86) | 34.58 (0.87) |
| Gestational age at delivery (week) | 38.79 (1.65) | 39.91 (5.78) |
| Season at enrolment, n (%) | ||
| Winter | 14 (38.2) | 16 (46.3) |
| Spring | 23 (61.8) | 20 (53.7) |
| Season at last visit, n (%) | ||
| Summer | 17 (44.4) | 14 (38.9) |
| Fall | 20 (55.6) | 22 (61.1) |
| Weight at enrollment (kg) | 60.91 (12.99) | 62.80 (12.61) |
| BMI at enrollment (kg/m2) | 24.70 (4.69) | 25.35 (5.00) |
| Weight at the end of pregnancy (kg) | 71.74 (11.89) | 74.82 (10.98) |
| Weight gain (kg) | 10.82 (5.21) | 12.01 (5.94) |
| Physical activity level at enrollment, n (%) | ||
| Low | 29 (78.4) | 28 (77.8) |
| Moderate | 8 (21.6) | 6 (16.7) |
| High | 0 (0.0) | 2 (5.6) |
| Physical activity level at last visit, n (%) | ||
| Low | 32 (86.5) | 29 (80.6) |
| Moderate | 5 (13.5) | 6 (16.7) |
| High | 0 (0.0) | 1 (2.8) |
Note. Data are expressed as mean (SD, standard deviation) and the distribution between groups expressed as n (%). Missing data were n = 2–6.
Abbreviation: BMI, body mass index.