Table 2

Significant multivariate findings for clinical characteristics of SIDS cases and control infants

		Model 1 Clinical characteristics only				Model 2 Including other factors
		OR (95% CI)	p Value			OR (95% CI)	p Value
At birth
< 10th birth weight centile	2.02 (1.23 to 3.31)	0.006		2.44 (1.13 to 5.26)	0.02
< 37 weeks' gestation	2.07 (1.18 to 3.62)	0.01		4.93 (2.16 to 11.24)	< 0.0001
Twin or triplet	5.83 (1.86 to 18.26)	0.003		7.81 (1.35 to 45.28)	0.02
Admission to SCBU	2.12 (1.26 to 3.59)	0.005		1.25 (0.53 to 2.95)	0.62
Major congenital anomaly	2.50 (1.04 to 6.01)	0.04		4.54 (1.32 to 15.56)	0.02
After hospital discharge
Problem with regurgitation	2.53 (1.35 to 4.76)	0.004		1.52 (0.55 to 4.15)	0.42
During life
Episode of lifelessness	3.72 (1.99 to 6.97)	< 0.0001		2.55 (1.02 to 6.41)	0.046
Before death/reference sleep
Last 24 hours: Baby Check (> 7)	3.58 (2.15 to 5.95)	< 0.0001		4.17 (1.88 to 9.24)	0.0004
Demanded less feed	3.48 (1.45 to 8.35)	0.005		1.89 (0.41 to 8.66)	0.42

In model 2 the following factors were controlled for: sex, maternal age, parity, previous stillbirths and deaths, parental unemployment, maternal smoking during pregnancy, parental estimation of postnatal exposure to tobacco smoke, intention to breast feed, moving accommodation, recent maternal alcohol consumption, partner's use of illegal drugs, recent change in infant routine, put down in prone position, put down in side position, bed sharing, room sharing, duvet use, tog value of clothing and bedding, length of previous sleep, and infant found with head covered.
Centiles were checked by means of charts developed by the UK cross sectional reference data 1995 (Child Growth Foundation).
CI, confidence interval; OR, odds ratio; SIDS, sudden infant death syndrome; SCBU, special care baby unit.