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SIDS risk factors and factors associated with prone sleeping in Sweden

Journal article
Authors Bernt Alm
Per Möllborg
Laslo Erdes
Rolf Pettersson
Nils Åberg
Gunnar Norvenius
Göran Wennergren
Published in Archives of Disease in Childhood
Volume 91
Issue 11
Pages 915-9
ISSN 0003-9888
Publication year 2006
Published at Institute of Clinical Sciences
Pages 915-9
Language en
Links dx.doi.org/10.1136/adc.2005.088328
Keywords Bottle Feeding/adverse effects, Epidemiologic Methods, Female, Humans, Infant, Male, Pregnancy, *Prone Position, *Sleep, Smoking/adverse effects, Sudden Infant Death/*epidemiology/etiology, Sweden/epidemiology
Subject categories Medical and Health Sciences

Abstract

OBJECTIVE: To compare the current prevalence of risk factors for sudden infant death syndrome (SIDS) in Sweden with a decade earlier, and assess factors associated with prone sleeping. METHODS: The results of a cohort study (Infants of Western Sweden) and a population based case-control study (Nordic Epidemiological SIDS Study) were examined. Subjects were 5600 healthy 6 month old infants born in 2003 in the Western Sweden region and 430 healthy Swedish infants born between 1991 and 1995. RESULTS: Prone sleeping decreased from 31.8% to 5.6% and supine sleeping increased from 35.3% to 47.3%. Side or side/supine sleeping increased from 25.2% to 43.8%. Maternal smoking during pregnancy decreased from 23.5% to 9.5%. The risk for prone sleeping increased if the mother was unemployed (OR 2.4, 95% CI 1.5 to 4.0), if she was a heavy smoker in the third trimester (OR 44.1, 95% CI 1.6 to 1199.6), and if the child was irritable (OR 2.5, 95% CI 1.3 to 5.1), shared a bedroom with siblings (OR 2.6, 95% CI 1.0 to 6.6), or never used a dummy (OR 3.2, 95% CI 1.9 to 5.4). CONCLUSIONS: Parents have complied with advice to prevent SIDS given at infant welfare centres for the last 10 years. A change in the preferred sleeping position from side variants to exclusively supine, and reducing the number of pregnant women smoking may be beneficial. Use of a prone sleeping position was associated with maternal employment status, maternal smoking, temperament of the child, dummy use, and sharing a bedroom with siblings.

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