Abstract
This prospective study examined the prevalence of snoring during infancy and the prenatal and postnatal risk factors for this condition. The study population comprised 1388 infants from the CHILD-SLEEP birth cohort, who were recruited in the Pirkanmaa Hospital District, Finland, between 2011 and 2013. Sleep and background factor questionnaires were filled out prenatally by parents and when the infant was three and eight months old. The prevalence of habitual snoring was 3.2% at the age of three months and 3.0% at eight months, and snoring infants had more sleeping difficulties at those ages, with odds ratios (ORs) of 3.11 and 4.63, respectively. At three months, snoring infants slept for a shorter length of time (p=0.001) and their sleep was more restless (p=0.004). In ordinal logistic regression models, parental snoring (adjusted OR=1.65 and 2.60) and maternal smoking (adjusted OR=2.21 and 2.17) were significantly associated with infant snoring at three and eight months, while formula feeding and dummy use (adjusted OR=1.48 and 1.56) were only associated with infant snoring at three months. Parental snoring and maternal smoking increased the risk of snoring. Infants who snored also seemed to suffer more from other sleep difficulties.
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