Neonatal outcomes after preterm birth by mothers’ health insurance status at birth: a retrospective cohort study

Table 4 Risk of adverse neonatal outcomes after birth for 1,016 ^a publicly insured women compared with 1,016 ^a privately insured women that were individually matched on the propensity score of maternal demographics

	n	Unadjusted	Adjusted for antenatal factors
	public/private	RR (95% CI)	ARR (95% CI)^b
Low Apgar score at 5 mins <7^c	15/6	2.50 (0.97–6.44)	2.63 (1.06–6.52)
>1 min to unassisted breathing^e	137/87	1.57 (1.22–2.02)	1.61 (1.25–2.07)
Resuscitation^f	12/10	1.20 (0.54–2.67)	---^d
Admission to special care	96/251	0.83 (0.80–0.87)	0.84 (0.80–0.87)

^a Restricted to singleton, preterm births (32–36 weeks gestation), where the infant was live-born and without birth defects.
^b Adjusted for threatened abortion, threatened pre-term labour, pre-eclampsia, placenta-praevia, and pre-labour rupture of membranes.
^c Apgar score at 5 minutes = 0–6.
^d Too small sample size for reliable estimation.
^e >1 minutes until establishment of unassisted breathing.
^f Endotracheal intubation or external cardiac massage.