Table 1

Distribution of infants by time of referral and time of birth, and the occurrence of the adverse perinatal outcomes
Births, n (%) Intrapartum and early neonatal mortality (%) Apgar score 0–6 (%) Composite outcome (%)
Referred to a hospital antepartum (n =310776)
Office hours 123689 (39.8) 0.14* 1.08* 3.24*
Off-hours 187087 (60.2) 0.21 1.46 4.32
Weekdays 224380 (72.2) 0.18* 1.28* 3.73*
Weekends 86396 (27.8) 0.21 1.39 4.32
Day 158496 (51.0) 0.15* 1.10* 3.37*
Evening 64952 (20.9) 0.20 1.58 4.21
Night 87328 (28.1) 0.24 1.49 4.61
Referred to a hospital intrapartum (n =138938)
Office hours 46266 (33.3) 0.17 1.15* 2.41*
Off-hours 92672 (66.7) 0.19 1.31 2.76
Weekdays 92255 (66.4) 0.18 1.26 2.59
Weekends 46683 (33.6) 0.19 1.24 2.75
Day 65023 (46.8) 0.17 1.12* 2.45*
Evening 28760 (20.7) 0.20 1.34 2.70
Night 45155 (32.5) 0.19 1.39 2.90

* p value for testing differences between time of birth groups with χ2-tests < 0.05.

Composite outcome consists of intrapartum and early neonatal mortality, Apgar score of 0–6, severe birth trauma, and admission to an neonatal intensive care unit.

Gijsen et al.

Gijsen et al. BMC Pregnancy and Childbirth 2012 12:92   doi:10.1186/1471-2393-12-92

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