Table 1.
The median (IQR) and range of maternal and umbilical cord sera total 25(OH)D, 25(OH)D2, 25(OH)D3, and 3-epi-25(OH)D3 among samples ≥limit of detection (0.4 nmol/L) as well as their respective 3-epi-25(OH)D3 to 25(OH)D3 ratios
| n | Median (IQR) | Range | |
|---|---|---|---|
| Maternal serum | |||
| Total 25(OH)D (nmol/L) | 1502 | 54.8 (42.6-69.0) | 13.4-184.8 |
| 25(OH)D2 (nmol/L) | 641 | 1.3 (0.8-2.7) | 0.4-42.7 |
| 25(OH)D3 (nmol/L) | 1502 | 53.0 (41.1-67.5) | 12.4-177.2 |
| 3-epi-25(OH)D3 (nmol/L) | 1419 | 1.9 (1.3-2.8) | 0.4-14.2 |
| 3-epi-25(OH)D3 to 25(OH)D3 ratio (%) | 1419 | 3.6 (2.8-4.5) | 0.5-19.9 |
| Umbilical cord serum | |||
| Total 25(OH)D (nmol/L) | 1321 | 40.7 (31.7-51.7) | 11.8-219.5 |
| 25(OH)D2 (nmol/L) | 140 | 1.4 (0.7-3.0) | 0.4-27.6 |
| 25(OH)D3 (nmol/L) | 1321 | 39.6 (30.5-50.4) | 10.8-218.5 |
| 3-epi-25(OH)D3 (nmol/L) | 1217 | 1.7 (1.1-2.4) | 0.4-10.9 |
| 3-epi-25(OH)D3 to 25(OH)D3 ratio (%) | 1217 | 4.2 (2.9-5.6) | 0.7-15.3 |
Abbreviations: 3-epi-25(OH)D3, isomeric form of 25(OH)D3; IQR, interquartile range.