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Table 2 Maternal and neonatal outcome

From: Induction of labor and postpartum blood loss

Blood loss parametersWomen with IOL (n = 380)Women with SOL (n = 585)p
Estimated blood loss (mL)400 (300–600)400 (300–500)0.03 a
Estimated blood loss ≥500 mL152 (40%)195 (33.3%)0.03 b
Estimated blood loss ≥1000 mL24 (6.3%)37 (6.3%)1.00 b
Estimated blood loss ≥1500 mL9 (2.4%)10 (1.7%)0.47 b
Postpartum Hemorrhage94 (24.7%)124 (21.2%)0.20 b
Delta hemoglobin (g/L)13 (5–21)16 (9.0–24.0)< 0.01 a
Delta hemoglobin ≥30 g/L49 (12.9%)81 (13.8%)0.67 b
Blood transfusion1 (0.3%)0 (0.0%)0.39 c
Secondary maternal outcome
 Vaginal delivery238 (62.6%)390 (66.7%)0.20 b
 Operative vaginal delivery51 (13.4%)72 (12.3%)0.61 b
 Second stage of labor > 120 min93 (30.6%)132 (26.7%)0.23 b
 Unplanned cesarean section91 (24%)123 (21.0%)0.29 b
 Maternal ICU admission2 (0.5%)0 (0.0%)0.15 c
 Uterine atony28 (7.4%)25 (4.3%)0.04 b
 Retained placenta10 (2.6%)16 (2.7%)0.92 b
 Retained placental tissue15 (3.9%)13 (2.2%)0.12 b
 Placental abruption1 (0.3%)5 (0.9%)0.41 c
 Uterine rupture1 (0.3%)2 (0.3%)1.0 c
 Length of hospital stay after delivery4 (3–4)4 (3–4)0.07 a
 Anal sphincter tear6 (1.6%)4 (0.7%)0.20 c
Secondary Neonatal outcome
 Chorioamnionitis5 (1.3%)3 (0.5%)0.28 c
 Shoulder dystocia7 (1.8%)10 (1.7%)0.88 b
 Meconium staining70 (18.4%)107 (18.3%)0.96 b
 Umbilical arterial pH < 7.15 (1.3%)11 (1.9%)0.50 b
 5′ Apgar score < 74 (1.1%)6 (1.0%)1.0 c
 10′ Apgar score < 71 (0.3%)0 (0%)0.39 c
 Admission to neonatal care unit23 (6.1%)16 (2.7%)0.11 b
  1. IOL induction of labor, SOL spontaneous onset of labor, Postpartum Hemorrhage: blood loss of ≥500 ml after spontaneous delivery or ≥ 1000 ml after cesarean section within 24 h of delivery
  2. Data presented as n (%), or median (25th percentile – 75th percentile) as appropriate. n number, SD standard deviation; a: Mann Whitney U- Test, b Chi Square Test, c: Fisher’s Exact test