Table 3

Neonatal outcomes associated with singleton live births of 37 and 38 weeks' gestation relative to singleton live births of 39–40 weeks' gestation

Resuscitation in delivery room*Oxygen therapy†Neonatal intensive care unit admissionNeonatal death
%ORAOR ‡ (95% CI)%ORAOR ‡ (95% CI)%ORAOR ‡ (95% CI)%ORAOR ‡ (95% CI)
Spontaneous§
 All
  37 weeks (n=1219)5.41.071.07 (0.81 to 1.41)2.71.201.21 (0.72 to 2.01)2.61.571.3 (0.7 to 2.41)0.482.252.44 (0.79 to 7.54)
  38 weeks (n=3213)4.90.960.97 (0.76 to 1.24)2.31.311.28 (0.83 to 1.97)1.70.890.94 (0.57 to 1.56)0.170.790.81 (0.22 to 2.96)
  39/40 weeks (n=6178)5.1Reference1.9Reference2.0Reference0.21Reference
 No maternal or fetal conditions
  37 weeks (n=1027)5.31.121.12 (0.82 to 1.54)2.61.521.55 (0.89 to 2.71)2.41.461.52 (0.76 to 3.04)0.572.993.27 (0.91 to 11.78)
  38 weeks (n=2743)4.30.910.92 (0.69 to 1.23)2.21.321.30 (0.79 to 2.13)1.60.780.75 (0.39 to 1.42)0.080.450.47 (0.12 to 1.87)
  39/40 weeks (n=5195)4.8Reference1.7Reference1.8Reference0.19Reference
 Maternal or fetal conditions¶
  37 weeks (n=192)8.00.870.92 (0.47 to 1.81)4.21.401.22 (0.54 to 2.75)4.11.821.78 (0.82 to 3.85)0.701.971.84 (0.33 to 10.26)
  38 weeks (n=470)5.91.211.21 (0.67 to 2.17)3.11.021.04 (0.38 to 1.84)1.80.610.66 (0.21 to 2.17)0.00-
  39/40 weeks (n=983)6.7Reference3.1Reference2.9Reference0.33Reference
Provider initiated
 All
  37 weeks (n=943)6.21.151.2 (0.85 to 1.69)6.02.722.83 (1.92 to 4.17)5.12.302.28 (1.5 to 3.46)0.302.682.99 (0.53 to 16.84)
  38 weeks (n=2869)4.30.790.83 (0.61 to 1.12)3.11.351.39 (0.97 to 1.99)3.01.331.29 (0.88 to 1.89)0.252.282.65 (0.73 to 9.64)
  39/40 weeks (n=4230)5.4Reference2.3Reference2.3Reference0.11Reference
 No maternal or fetal conditions
  37 weeks (n=538)5.51.221.26 (0.79 to 1.99)4.52.882.93 (1.72 to 4.98)3.62.072.01 (1.18 to 3.41)0.2611.7314.40 (1.94 to 106.69)
  38 weeks (n=1980)3.50.760.8 (0.54 to 1.16)3.01.871.92 (1.18 to 3.13)2.81.631.56 (1.02 to 2.6)0.2411.1513.76 (2.84 to 66.75)
  39/40 weeks (n=3069)4.5Reference1.6Reference1.8Reference0.02Reference
 Maternal or fetal conditions¶
  37 weeks (n=405)7.10.900.99 (0.59 to 1.69)7.92.032.11 (1.21 to 3.72)7.12.031.95 (1.01 to 3.83)0.361.021.07 (0.12 to 9.4)
  38 weeks (n=889)6.20.780.81 (0.51 to 1.28)3.30.820.81 (0.50 to 1.33)3.30.920.92 (0.55 to 1.54)0.280.800.93 (0.19 to 4.65)
  39/40 weeks (n=1161)7.8Reference4.1Reference3.6Reference0.35Reference
  • *Positive pressure ventilation, orotracheal intubation, cardiac massage or use of drugs.

  • †Oxygen hood, continuous positive airway pressure or mechanical ventilation during hospitalisation.

  • ‡Adjusted for capacity of hospital of birth, payment of birth, age, years of schooling, parity, previous caesarean section, history of stillbirth or neonatal death and mode of birth.

  • §Spontaneous onset of labour or premature rupture of membranes.

  • ¶Women with the following conditions: hypertensive disorders (chronic hypertension, pre-eclampsia, and HELLP syndrome); eclampsia; pre-existing and gestational diabetes; renal, cardiac or autoimmune diseases; severe infection at admission for birth; placental abruption and placental praevia and fetuses with IUGR.

  • AOR, adjusted OR; HELLP, haemolysis, elevated liver enzymes and low platelet count; IUGR, intrauterine growth restriction.