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Table 1 Baseline criteria comparing uncomplicated and difficult fetal extraction

From: Maternal and neonatal outcome of reverse breech extraction of an impacted fetal head during caesarean section in advanced stage of labour: a retrospective cohort study

  baseline criteria group 1: group 2: p-value
mean ± SD / n (%) uncomplicated (n = 492) difficult (n = 137)
obstetrical gestational age (in weeks) 39.8 ± 1.1 39.64 ± 1.1 0.03
full cervical dilation (10 cm) 310 (63.0) 103 (75.2) 0.008*
cephalic malpresentation 260 (52.9) 91 (66.4) 0.005*
maternal age (in years) 31.7 ± 5.0 31.6 ± 5.1 0.934
BMI before pregnancy (in kg/m2) 22.8 ± 4.0 23.5 ± 4.7 0.075
neonatal weight (in g) 3555.9 ± 450.8 3453.2 ± 420.9 0.02
head circumference > 35 cm 267 (54.3) 53 (38.7) 0.001*
  1. SD standard deviation, n (%) number (per cent), BMI body mass index, *significant statistical difference between the groups (p < 0.01)