Table 2

Logistic regression for GDM

CharacteristicOdds ratio (95% CI)
Maternal prepregnancy BMI (kg/m2)1.103 (1.034–1.176)
Maternal age (years)1.164 (1.019–1.330)
Maternal ethnicity1.811 (1.225–2.679)
Amniotic fluid glucose (mmol/l)1.186 (1.052–1.338)*
Amniotic fluid insulin (pmol/l)1.679 (0.915–3.081)*
Amniotic fluid IGFBP1 (μg/ml)1.00 (1.00–1.00)*
β-Hydroxybutyric acid (μmol/l)1.00 (0.99–1.001)*
  • *Amniotic fluid constituents were included one at a time in different GDM logistic regression models. Glucose was the only significant amniotic fluid constituent that predicted a later diagnosis of GDM because the 95% CI did not pass through 1. The model controlled for prepregnancy BMI, maternal age, and ethnicity, where parity and smoking were also entered but were not significant. n = 386.