Table 5 Association between 25(OH)D status and gestational diabetes mellitus
Parameters | Non-GDM | GDM | P value | Multivariable-adjusted | |
|---|---|---|---|---|---|
OR (95%) | P value | ||||
Age |  |  |  < 0.001 |  |  |
  < 35 | 1098 (84.1) | 207 (15.9) |  | 1 (reference) |  |
  ≥ 35 | 154 (73.0) | 57 (27.0) |  | 1.086 (1.266–2.576) | 0.001 |
Parity | Â | Â | 0.107 | Â | Â |
 0 | 662 (84.4) | 122 (15.6) |  | 1 (reference) |  |
 1 | 528 (81.0) | 124 (19.0) |  | 1.142 (0.857–1.523) | 0.364 |
  ≥ 2 | 62 (77.5) | 18 (22.5) |  | 1.367 (0.769–2.430) | 0.287 |
25(OH)D | Â | Â | 0.627 | Â | Â |
  ≥ 75 nmol/L | 170 (85.0) | 30 (15.0) |  | 1 (reference) |  |
 50–74 nmol/L | 725 (82.2) | 157 (17.8) |  | 1.250 (0.763–2.046) | 0.376 |
  < 50 nmol/L | 357 (82.3) | 77 (17.7) |  | 1.224 (0.794–1.888) | 0.360 |
Season at sampling | Â | Â | 0.334 | Â | Â |
 Spring | 459 (83.9) | 88 (16.1) |  | 1 (reference) |  |
 Summer | 475 (82.6) | 100 (17.4) |  | 1.098 (0.793–1.521) | 0.573 |
 Fall | 205 (82.7) | 43 (17.3) |  | 1.137 (0.737–1.755) | 0.561 |
 Winter | 205 (82.7) | 33 (22.6) |  | 1.472 (0.932–2.325) | 0.097 |