Clinical Study

Risk Factors for Cesarean Delivery following Labor Induction in Multiparous Women

Table 1

Characteristics of the study population at start of induction of labor.

CharacteristicsFailed induction in multiparous women ( )Successful induction in multiparous women ( )Odds ratio (95% CI) value

Maternal age in years, mean (±SD)32.5 (3.8)32.1 (3.7)1.1 (0.96–1.1)0.447
Gestational age in weeks, median (range)39+2 (37+0–42+1)40+2 (37+0–42+2)0.97 (0.95–0.99)0.021
BMI in kg/m2, mean (±SD)27.8 (5.3)25.8 (5.2)1.1 (1.01–1.14)0.024
Height in cm, mean (±SD)165.7 (7.3)169.4 (6.7)0.92 (0.88–0.97)<0.001
Weight gain in pregnancy in kg, mean (±SD)12.1 (5.2)13.7 (5.4)0.94 (0.88–1.0)0.105
Parity
 152 (65%)99 (62%)0.87 (0.50–1.5)0.637
 ≥228 (35%)61 (38%)
History of preterm delivery21 (27%)14 (9%)3.5 (1.8–6.9)0.0001
Previous cesarean delivery6 (8%)6 (4%)2.1 (0.65–6.7)0.218
Reason for induction
 Prelabor rupture of membranes3 (4%)8 (5%)1.00.411
 Hypertensive disorder14 (18%)24 (15%)1.6 (0.35–6.8)0.559
 Postdates (≥42+0)16 (20%)36 (23%)1.2 (0.28–5.1)0.819
 Maternal disease7 (9%)15 (9%)1.2 (0.25–6.2)0.789
 Intrauterine growth restriction5 (6%)11 (7%)1.2 (0.22–6.6)0.824
  Nonreassuring fetal heart rate2 (3%)1 (1%)5.3 (0.34–83)0.232
 Other reasons17 (21%)18 (11%)2.5 (0.57–11)0.222
 Maternal request16 (20%)47 (29%)0.91 (0.21–3.8)0.895

CI: confidence interval.