Table 1.

Description of continuous variables in the two study groups^a

Continuous variable	Group	N	Mean	MIN	MAX	SD	p	95% CI
Maternal age (years)	OOH	116	25.43	11	41	6.736	0.031	24.19–26.67
	IHB	299	23.91	13	43	6.111		23.22–24.61
	Total	415
Number of pregnancies	OOH	113	3.48	1	13	2.031	<0.001	3.10–3.86
	IHB	301	2.25	1	12	1.648		2.06–2.44
	Total	414
Antenatal care visits	OOH	87	3.52	0	12	3.507	<0.001	2.77–4.26
	IHB	242	7.1	0	17	3.159		6.70–7.50
	Total	329
Mean gestational age (weeks)	OOH	116	38.088	22	42.1	3.275	0.02	37.48–38.69
	IHB	302	38.787	24	42	2.394		38.51–39.05
	Total	418
Weight (g)	OOH	113	2767	500	3970	616.21	<0.001	2652.10–2881.81
	IHB	301	3112	630	4700	613.2		3042.45–3181.56
	Total	414
Apgar (5-minute)	IHB	290	9.05	2	10	1.021		8.93–9.17
	Total	309
Length of stay (days)	OOH	111	5.75	1	76	9.568	<0.001	3.95–7.55
	IHB	301	4.23	1	72	7.06		3.43–5.03
	Total	412

CI; confidence interval;

^aIHB: in-hospital birth; MAX: maximum; MIN: minimum; N: frequency; aOOH: unplanned out-of-hospital birth; p: p-value (Mann–Whitney test); SD: standard deviation