. 2015 May 8;104(8):777–783. doi: 10.1111/apa.13021

Table 2.

Incidence of potential risk factors for sudden infant death and explained deaths in infancy with odds ratios and 95% confidence intervals. ORs denote SIDS risk compared with explained SUDI. Data from medical records

	SIDS		Explained SUDI		OR	95% CI	p
	n	%	n	%	OR	95% CI	p
Position placed^a
Prone	20	66.7	10	33.3	0.73	0.26–2.06	0.80
Supine	19	59.4	13	40.6	1	ref	ref
Side	7	58.3	5	41.7	1.04	0.27–4.02	0.95
Position found^a
Prone	42	60.0	28	40.0	4.67	0.54–40.03	0.16
Supine	13	46.4	15	53.6	1	ref	ref
Side	7	87.5	1	12.5	8.08	0.88–74.59	0.07
Slept in parental bed^a
Yes	58	67.4	28	32.6	7.77	2.36–25.57	<0.001
No	4	21.1	15	78.9	1	ref	ref
Any breastfeeding^a
Yes	75	58.6	53	41.4	2.48	1.29–4.76	0.006
No	20	36.4	35	63.6	1	ref	ref
Gender^b
Male	86	53.1	76	46.9	0.90	0.55–1.49	0.67
Female	50	50.5	49	49.5	1	ref	ref
Gestational age <37 weeks^b
Yes	18	40.9	26	59.1	0.49	0.25–0.95	0.036
No	109	58.6	77	41.4	1	ref	ref
Birthweight^b
<2500 g	18	45.0	22	55.0	0.58	0.29–1.16	0.12
2500–4500 g	107	58.5	76	41.5	1	ref	ref
>4500 g	2	40.0	3	60.0	0.47	0.08–2.90	0.42
Smoking during 1st trimester^b
Nil	74	53.2	65	46.8	1	ref	ref
1–9 cig/day	30	68.2	14	31.8	1.95	0.96–3.97	0.07
10+ cig/day	13	52.0	12	48.0	0.99	0.42–2.30	0.98

Data from medical records.

Data from the Medical Birth Register.