Sleep differences in one-year-old children were related to obesity risks based on their parents' weight according to baseline longitudinal study data.

Aim: Parental obesity is the predominant risk factor for child obesity. We compared sleep in one-year-old children with different obesity risks, based on parental weight, and explored associations with weight, parental sleep and family factors.

Methods: Baseline data from 167 families participating in a longitudinal obesity prevention programme was used.