Table 2.
Maternal 25OHD and markers of glucose metabolism in early and late pregnancy among the total group and categorised by season of first antenatal visit
| Season at first antenatal visit | ||||
|---|---|---|---|---|
| Total Group (n = 334) |
Winter (n = 166) |
Summer (n = 168) |
P d | |
| 25OHD early <30 nmol/L a | 90 (26.9) | 64 (38.6) | 26 (15.5) | <0.001 |
| 25OHD early <50 nmol/L a | 205 (61.4) | 121 (72.9) | 84 (50.0) | 0.002 |
| 25OHD 28 weeks <30 nmol/L a | 111 (33.2) | 56 (33.7) | 55 (32.7) | 0.662 |
| 25OHD 28 weeks <50 nmol/L a | 211 (63.2) | 103 (62.0) | 107 (63.7) | 0.999 |
| HOMA-IR early b | 2.1 (2.6) | 2.4 (2.8) | 1.7 (2.0) | 0.004 |
| HOMA-IR 28 weeks b | 2.8 (3.15) | 2.9 (3.4) | 2.6 (2.6) | 0.064 |
| Insulin early (μU/mL) b | 11.3 (12.3) | 12.8 (13.1) | 9.3 (11.1) | 0.002 |
| Insulin 28 weeks (μU/mL) b | 14.4 (15.6) | 14.6 (16.8) | 14.1 (11.8) | 0.108 |
| Fasting glucose early (mmol/L) c | 4.48 (0.35) | 4.47 (0.33) | 4.49 (0.37) | 0.566 |
| Fasting glucose 28 weeks (mmol/L) c | 4.46 (0.46) | 4.49 (0.45) | 4.42 (0.46) | 0.157 |
| 1-h GCT 28 weeks (mmol/L) c | 6.48 (1.44) | 6.47 (1.39) | 6.50 (1.48) | 0.864 |
Data presented as an (%), bmedian (interquartile range), cmean (SD)
dComparison between winter and summer