Potential relationships between objectively measured sleep disturbances and neurobehavioral function in a community cohort of 5- to 7-year old children with parentally reported symptoms of ADHD were investigated at the University of Louisville, KY. Snoring was unusually prevalent among mildly affected ADHD children, and sleep-disordered breathing (SDB) was significantly prevalent among children with mild hyperactive behavior. SDB was not significantly correlated with ADHD, but rapid eye movement sleep was disturbed and contributed to the behavior. [1]