Table 2—

Multivariate analysis on GDM risk factors for all women, stratified by ethnicity and BMI

VariableAll women (n=1,466)Stratified by ethnicity
Stratified by BMI
GP only (n=1,263)AB only (n=203)BMI <27 kg/m2 (n=1,084)BMI ≥27 kg/m2 (n=382)
Aboriginal ethnicity1.98 (1.06–3.69)*0.65 (0.21, 2.03)4.66 (1.98, 10.96)
Pregravid BMI ≥27 (vs. <27)2.30 (1.35–3.93)1.41 (0.71, 2.78)8.56 (2.66, 27.55)
History of GDM§12.86 (6.13–26.95)26.83 (11.10, 64.80)2.67 (0.67, 10.56)13.56 (4.95, 37.15)12.76 (3.95, 41.19)
Family history of diabetes2.70 (1.53–4.76)2.85 (1.41, 5.79)2.13 (0.78, 5.77)2.77 (1.26, 6.09)2.46 (1.05, 5.78)*
Age ≥30 years (vs. <30 years)1.27 (0.74–2.18)0.91 (0.48, 1.74)2.14 (0.78, 5.88)1.12 (0.54, 2.32)1.28 (0.56, 2.92)
Age, further analysis3.47 (1.17, 10.25)* at ≥38 years3.31 (1.08, 10.16)* at ≥33 years
  • Data are ORs (95% CI) for presence of GDM, adjusted for all other variables.

  • *

    * P < 0.05;

  • P < 0.001;

  • P < 0.01;

  • §

    § for primagravida, previous GDM=No;

  • includes only parent and/or sibling;

  • point at which age becomes significant, adjusted for same variables as in above model.