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Table 2 Birth conditions of very preterm singletons by mode of conceptions

From: Morbidity and mortality among very preterm singletons following fertility treatment in Australia and New Zealand, a population cohort study

  Number Percent OR (95% CI) AOR (95% CI)a
Small for gestational age
 Spontaneous conception 1833 8.9 Ref Ref
 HO 35 16.2 1.97 (1.37–2.84) 1.52 (1.02–2.67)
 ART 102 10.7 1.22 (0.99–1.51) 1.09 (0.87–1.38)
 AI 16 29.6 4.29 (2.39–7.71) 2.98 (1.53–5.81)
5 min APGAR (Mod/ severe depressed)
 Spontaneous conception 3659 18.0 Ref Ref
 HO 35 16.2 0.88 (0.61–1.27) 0.78 (0.52–1.18)
 ART 176 18.6 1.04 (0.88–1.23) 1.02 (0.85–1.24)
 AI 10 18.5 1.04 (0.52–2.06) 1.07 (0.52–2.22)
Extreme Low birth weight (<1000 g)
 Spontaneous conception 6676 32.5 Ref Ref
 HO 88 40.7 1.43 (1.09–1.87) 1.13 (0.72–1.79)
 ART 351 36.8 1.21 (1.06–1.38) 1.11 (0.88–1.40)
 AI 22 40.7 1.43 (0.83–2.46) 1.01 (0.43–2.42)
Intubation during resuscitation
 Spontaneous conception 8405 41.0 Ref Ref
 HO 101 46.8 1.26 (0.97–1.65) 1.16 (0.84–1.60)
 ART 440 46.3 1.24 (1.09–1.41) 1.11 (0.94–1.30)
 AI 22 40.7 0.97 (0.57–1.70) 0.87 (0.46–1.64)
Congenital abnormalities
 Spontaneous conception 1197 6.0 Ref Ref
 HO 10 4.9 0.80 (0.42–1.51) 0.80 (0.42–1.52)
 ART 93 10.1 1.75 (1.40–2.19) 1.71 (1.36–2.16)
 AI 9 16.7 3.12 (1.52–6.40) 3.01 (1.47–6.19)
  1. a Adjusted for maternal age, gestational age, ethnicity, previous pre term, previous prenatal death, maternal hypertension, antepartum haemorrhage, premature rupture of membranes and antenatal steroid
  2. Significant results are in bold