Table 3.
Crude and adjusted effects on predictors of CS delivery following labor induction
| Characteristic | Crude RR (95% CI+) | p-value | Adjusted RR (95% CI+) | p-value |
|---|---|---|---|---|
| Parity | ||||
| Multiparous | Ref | Ref | ||
| Primiparous | 1.48 (1.20–1.82) | < 0.001 | 1.46 (1.18–1.81) | < 0.001 |
| Gestational age | ||||
| Term | Ref | Ref | ||
| Preterm | 0.45 (0.33–0.60) | < 0.001 | 0.77 (0.51–1.17) | 0.221 |
| Post term | 1.57 (1.19–2.07) | 0.001 | 1.45 (1.09–1.93) | 0.009 |
| Birthweight (kg) | ||||
| 2.5–3.5 | Ref | Ref | ||
| < 2.5 | 0.48 (0.36–0.63) | < 0.001 | 0.69 (0.48–1.01) | 0.051 |
| > 3.5 | 1.28 (1.03–1.60) | 0.027 | 1.28 (1.02–1.61) | 0.030 |
| Residence | ||||
| Rural | Ref | Ref | ||
| Urban | 1.33 (1.09–1.63) | 0.004 | 1.29 (1.05–1.58) | 0.015 |
| Indications for IOL | ||||
| PROM | Ref | Ref | ||
| Postdates | 2.96 (1.71–5.12) | 0.053 | 2.00 (0.99–4.04) | 0.053 |
| Methods of Induction | ||||
| Oxytocin | Ref | Ref | ||
| Prostaglandins | 0.55 (0.37–0.82) | 0.003 | 0.67 (0.44–1.03) | 0.065 |
| Body mass index | ||||
| Normal | Ref | |||
| Underweight | 0.97 (0.77–1.21) | 0.105 | ||
| Overweight | 0.86 (0.68–1.11) | 0.246 | – | – |
| Obese | 0.81 (0.62–1.05) | 0.111 | ||
| Maternal age | ||||
| < 24 | Ref | |||
| 24–35 | 0.97 (0.77–1.21) | 0.780 | – | – |
| > 35 | 0.89 (0.65–1.21) | 0.450 | ||
Ref Reference category, +CI Confidence Interval