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. 1999 Dec 4;319(7223):1457-61.
doi: 10.1136/bmj.319.7223.1457.

Babies sleeping with parents: case-control study of factors influencing the risk of the sudden infant death syndrome. CESDI SUDI research group

P S Blair  1 , P J Fleming, I J Smith, M W Platt, J Young, P Nadin, P J Berry, J Golding
Affiliations

Babies sleeping with parents: case-control study of factors influencing the risk of the sudden infant death syndrome. CESDI SUDI research group

P S Blair et al. BMJ. .

Abstract

Objective: To investigate the risks of the sudden infant death syndrome and factors that may contribute to unsafe sleeping environments.

Design: Three year, population based case-control study. Parental interviews were conducted for each sudden infant death and for four controls matched for age, locality, and time of sleep.

Setting: Five regions in England with a total population of over 17 million people.

Subjects: 325 babies who died and 1300 control infants.

Results: In the multivariate analysis infants who shared their parents' bed and were then put back in their own cot had no increased risk (odds ratio 0.67; 95% confidence interval 0.22 to 2.00). There was an increased risk for infants who shared the bed for the whole sleep or were taken to and found in the parental bed (9.78; 4.02 to 23.83), infants who slept in a separate room from their parents (10.49; 4.26 to 25.81), and infants who shared a sofa (48.99; 5.04 to 475.60). The risk associated with being found in the parental bed was not significant for older infants (>14 weeks) or for infants of parents who did not smoke and became non-significant after adjustment for recent maternal alcohol consumption (>2 units), use of duvets (>4 togs), parental tiredness (infant slept </=4 hours for longest sleep in previous 24 hours), and overcrowded housing conditions (>2 people per room of the house).

Conclusions: There are certain circumstances when bed sharing should be avoided, particularly for infants under four months old. Parents sleeping on a sofa with infants should always be avoided. There is no evidence that bed sharing is hazardous for infants of parents who do not smoke.

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Figures

Figure
Figure
Usual night time sleeping environment by infant age. Numbers of infants: 7-60 days—88 index infants and 352 controls; 61-120 days —188 and 472; ⩾120 days—113 and 452. Each age band represents third of whole dataset and nearest whole month in age
See this image and copyright information in PMC

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