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Table 1 Distribution of infants by time of referral and time of birth, and the occurrence of the adverse perinatal outcomes

From: Effects of hospital delivery during off-hours on perinatal outcome in several subgroups: a retrospective cohort study

 

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

  1. * p value for testing differences between time of birth groups with χ2-tests < 0.05.
  2. † 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.