Table 3.
A backward stepwise multivariable logistic regression model including IAI as the dependent variable and maternal age, pre-pregnancy BMI, smoking status and gestational age at amniocentesis and amniotic fluid RBP4 concentration ≥1149.8 ng/mL as covariates.
| Odds ratio | 95% CI | p | |
|---|---|---|---|
| Maternal age | 0.94 | 0.88-1.01 | 0.08 |
| Pre-pregnancy BMI | 1.17 | 1.05-1.30 | 0.004 |
| Smoking status | 1.79 | 0.63-5.09 | 0.3 |
| GA at amniocentesis | 0.91 | 0.77-1.09 | 0.3 |
| Amniotic fluid RBP4 concentration ≥1149.8 ng/mL | 4.6 | 1.91-11.05 | 0.001 |
CI: confidence interval; BMI: body mass index; GA: gestational age; RBP4: retinol binding protein 4