[Bed-sharing in the first semester of life: prevalence and associated factors].

The aim of this study was to verify the prevalence of bed-sharing and factors associated with this sleeping environment in an urban population in Southern Brazil. This was a cross-sectional nested cohort study with 233 mother-infant pairs selected at the maternity ward of the University Hospital in Porto Alegre. When the infant was 3 and 6 months old, home visits were performed to collect data on bed-sharing and associated variables.