Table 1.
Baseline characteristics of mothers and infants by type of maternal vitamin D supplementation regimen and follow‐up status
| Characteristic | Subjects completing study | Subjects lost to follow‐up | Total | |||
|---|---|---|---|---|---|---|
| Daily regimen | Monthly regimen | Daily regimen | Monthly regimen | Daily regimen | Monthly regimen | |
| Mothers (n) | 22 | 22 | 23 | 23 | 45 | 45 |
| Age (year)* | 28.1 ± 4.7 | 27.6 ± 6.5 | 30.3 ± 6.1 | 32.1 ± 6.2 | 29.2 ± 5.5 | 29.9 ± 6.7 |
| Weight (kg)* | 74.5 ± 11.7 | 71.3 ± 11.7 | 70.8 ± 11.5 | 68.7 ± 19.9 | 72.6 ± 11.6 | 70.1 ± 16.1 |
| Parity † | 3.0 | 2.0 | 3.0 | 3.0 | 3.0 | 2.5 |
| Education † | 5.0 | 4.0 | 4.0 | 4.5 | 4.5 | 5.0 |
| Sunlight exposure (h day−1)* | 0.3 ± 0.5 | 0.3 ± 0.6 | 0.5 ± 1.1 | 0.4 ± 0.7 | 0.4 ± 0.8 | 0.4 ± 0.6 |
| Serum 25(OH)D (nmol L−1)* | 29.2 ± 10.2 | 22.3 ± 10.0 | 27.3 ± 10.4 | 23.2 ± 10.7 | 27.3 ± 10.4 | 23.2 ± 10.7 |
| Vitamin D deficient (%) ‡ | 86 [19] | 91 [20] | 91 [21] | 83 [19] | 89 [40] | 87 [39] |
| Infants (n) | 22 | 24 | 23 | 23 | 45 | 47 |
| Age (days)* | 19.1 ± 25.4 | 20.6 ± 22.9 | 18.6 ± 19.9 | 24.2 ± 28.5 | 18.9 ± 22.5 | 22.4 ± 25.6 |
| Weight (kg)* | 3.7 ± 0.86 | 3.6 ± 0.86 | 3.8 ± 1.1 | 4.0 ± 1.5 | 3.7 ± 1.0 | 3.8 ± 1.2 |
| Serum 25(OH)D (nmol L−1)* | 13.9 ± 8.6 | 13.7 ± 12.1 | 12.4 ± 5.3 | 16.2 ± 9.6 | 13.1 ± 7.1 | 15.0 ± 10.9 |
| Vitamin D deficient (%) ‡ | 96 [21] | 92 [22] | 100 [23] | 91 [21] | 98 [44] | 92 [43] |
25(OH)D, 25‐hydroxyvitamin D; Educational status (1–5), illiterate, primary, secondary, high school and college; *Mean ± SD; †Median. ‡ n in brackets.