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Table 3 Within the VD group, comparison of variables of the subgroups cephalic (n = 153) and non-cephalic (n = 54) presentation

From: Delivery of the second twin: influence of presentation on neonatal outcome, a case controlled study

  Cephalic n = 153 Breech n = 54 p-value
Age of the mother (years) 31.2 ± 5.2 32.0 ± 3.9 ns (0.22)
Parity n
 1 67 (43,8%) 10 (18,5%) 0.002
 2+ 76 (56,2%) 44(81,5%)
Gestational age (weeks) 36.1 ± 1.4 36.7 ± 1.2 0.007
32–35 56 (36,6%) 9 (16,7%)
36–40 97 (63,4%) 45 (83,3%)
Gender m/f (%) 65/88 (42.5/53.5) 35/19 (64.8/35.2) p = 0.005
Chorionicity (%) mono/di/na 26/103/24 (17.0/67.3/15.7) 18/34/2 (33.3/62.0/3.7) p = 0.04
Lung maturition n 9 7 ns (p = 0.09)
Induction of labor n 70 (45,7%) 29 (53,7%) ns (p = 0.32)
Twin-twin interval (min) 13.2 ± 10.8 17.02 ± 12.7 0.04
Birth weight (g) 2494 ± 392 2577 ± 409 0.19
Head cirumference (cm) 32.9 ± 1.4 33.1 ± 1.1 0.48
Apgar 5 (n)
 6–8 18 8 ns (p = 0.2)
  < 6 1 1
UA pH 7.27 ± 0.08 7.24 ± 0.08 0.03
< 7.10 (n) 7 1
7.10–7.20 (n) 18 16
Transfer to NICU (n) due to distress 30 8 ns (p = 0.5)
4 2
  1. Continuous data are given by mean and+/− standard deviation