Table 1.
Differences in clinical characteristics between the new GDM group, the old GDM group, and NGT group.
| New GDM Group 1 |
P
1 versus 2 |
Old GDM Group 2 |
P
2 versus 3 |
NGT Group 3 |
P
1 versus 3 |
|
|---|---|---|---|---|---|---|
| N (%) | 160 (2.4) | 222 (3.3) | 6345 (94.3) | |||
| Age (SD) | 31.6 (4.7) | 0.010 | 33.3 (7.2) | <0.001 | 30.9 (4.8) | 0.103 |
| BMI (SD) | 23.3 (3.7) | 0.281 | 24.1 (4.5) | 0.426 | 23.7 (4.4) | 0.510 |
| BMI ≥ 25 kg/m² | 27.5% | 0.430 | 35.1% | 0.477 | 30.6% | 0.701 |
| BME | 17.4% | 0.677 | 19.7% | <0.001 | 9.5% | <0.001 |
| Multiparous | 25.5% | 0.272 | 20.6% | 0.109 | 16.3% | 0.003 |
| Primigravid | 38.2% | 0.309 | 43.2% | 0.102 | 38.1% | 0.276 |
GDM: gestational diabetes; new GDM group: prior classified normal by old criteria and now GDM according to the new IADPSG criteria; old GDM group: classified GDM according to Carpenter and Coustan criteria (old criteria); NGT: normal glucose tolerance; SD: standard deviation; BME: black or minority ethnic origin.