Table 1 Maternal characteristics of subjects in non-GDM and GDM groups before (period 1) and after (period 2) changes of GDM diagnostic criteria
Period 1 (NDDG criteria) | Period 2 (C–C criteria) | Interaction test P-value* | |||||
|---|---|---|---|---|---|---|---|
Non-GDM (n = 607) | GDM (n = 25) | P-value | Non-GDM (n = 1,027) | GDM (n = 105) | P-value | ||
Maternal age (year) | 31.1 ± 3.8 | 33.9 ± 4.2 | 0.001 | 32.8 ± 3.6 | 34.1 ± 3.7 | < 0.001 | 0.068 |
Maternal age ≥ 35 years | 102 (16.8) | 11 (44.0) | 0.002 | 321 (31.3) | 48 (45.7) | 0.003 | 0.111 |
Pre-pregnancy BMI (Kg/m2) | 20.6 ± 2.7 | 22.6 ± 4.5 | 0.119 | 21.0 ± 3.0 | 22.3 ± 3.8 | 0.001 | 0.368 |
Gestational weight gain (Kg) | 17.6 ± 5.8 | 12.7 ± 4.9 | < 0.001 | 15.7 ± 6.2 | 12.3 ± 5.1 | < 0.001 | 0.293 |
Multiparity | 143 (23.6) | 9 (36.0) | 0.154 | 231 (22.5) | 25 (23.8) | 0.759 | 0.281 |
History of PTD | 19 (3.1) | 4 (16.0) | 0.010 | 35 (3.4) | 6 (5.7) | 0.264 | 0.099 |
ART pregnancy | 268 (44.2) | 11 (44.0) | 0.988 | 495 (48.3) | 61 (58.1) | 0.055 | 0.381 |
Chorionicity | 0.705 | 0.024 | 0.722 | ||||
Monoamnionic | 5 (0.8) | 0 (0) | 2 (0.2) | 1 (1.0) | |||
Monochorionic diamnionic | 163 (26.9) | 5 (20.0) | 198 (19.3) | 11 (10.5) | |||
Dichorionic diamnionic | 430 (70.8) | 19 (76.0) | 827 (80.5) | 93 (88.6) | |||
Unknown | 9 (1.5) | 1 (4.0) | 0 (0) | 0 (0) | |||
Insulin treatment | 0 (0) | 5 (20.0) | NA | 0 (0) | 24 (23.1) | NA | NA |