Table 3.
Multivariate analysis of factors affecting delivery mode in induction of labour
| Factors | ORa | 95% CI | p-valueb |
|---|---|---|---|
| Nulliparous | |||
| Age (years) | 0.95 | 0.86–1.01 | 0.12 |
| Hemoglobin at time of IOL (g/dl) | 0.82 | 0.65–1.01 | 0.07 |
| Gestational age of the fetus (weeks) | 1.12 | 0.95–1.31 | 0.18 |
| Bishop Score | 1.23 | 1.03–1.28 | 0.03 |
| Status of the membrane at the time of induction | 1.1 | 0.69–1.6 | 0.27 |
| Indication for induction - Intrahepatic cholestasis of pregnancy | 0.1 | 0.67–1.49 | 0.79 |
| Multiparous | |||
| Maternal BMI at time of IOL (kg/m2) | 0.89 | 0.84–0.96 | 0.005 |
| Bishop Score | 1.5 | 1.1–2.1 | 0.01 |
| Interval between last pregnancy and current pregnancy (months) | 0.99 | 0.98–1.0 | 0.19 |
| Method of induction used | 1.1 | 0.46–2.8 | 0.97 |
| Status of the membrane at time of induction | 0.14 | 0.15–1.2 | 0.72 |
CI: confidence interval; IOL: induction of labour, BMI: body mass index.
a OR: odds ratio of vaginal delivery
b Two-sided p-value based on binary logistic regression adjusted for all factors shown