Table 1 Maternal demographic and clinical characteristics of participants completing the 75-g oral glucose tolerance test a
|  | Total (n = 1136) | P value* | ||
|---|---|---|---|---|
Chinese (n = 644) | Malay (n = 290) | Indian (n = 202) | ||
Maternal age, y | 31.7 ± 4.9 | 29.0 ± 5.5 | 29.7 ± 4.6 | <0.001 |
Primiparous | 308 (47.8%) | 116 (40.0%) | 73 (36.1%) | 0.005 |
Pre-pregnancy BMI, kg/m2 | 21.6 ± 3.4 | 24.4 ± 5.6 | 23.9 ± 4.4 | <0.001 |
  BMI > 30 kg/m2 | 17 (2.6%) | 41 (14.1%) | 18 (8.9%) | <0.001 |
  BMI 25–30 kg/m2 | 68 (10.6%) | 64 (22.0%) | 49 (24.3%) |  |
  BMI <25 kg/m2 | 501 (77.8%) | 158 (54.5%) | 119 (58.9%) |  |
  Missing data | 58 (9.0%) | 27 (9.3%) | 16 (7.9%) |  |
Family history of diabetes mellitus | 156 (24.8%) | 87 (31.0%) | 91 (46.7%) | <0.001 |
Previous history of GDM | 24 (3.8%) | 6 (2.1%) | 9 (4.6%) | 0.288 |
Previous birth ≥4.5 kg | 3 (0.5%) | 1 (0.4%) | 0 (0%) | 0.626 |
One or more NICE risk factors except ethnicity | 177 (27.5%) | 117 (40.3%) | 101 (50.0%) | <0.001 |
Fasting plasma glucose ≥7.0 mmol/L | 1 (0.2%) | 3 (1.0%) | 1 (0.5%) | 0.170 |
2 h post OGTT Plasma glucose ≥7.8 mmol/L | 135 (21.0%) | 34 (11.7%) | 45 (22.3%) | 0.001 |