A study of children between the ages of 3 and 5 years shows that preschool children with sleep-disordered breathing – either primary snoring or mild obstructive sleep apnea – had consistently poorer quality of life than control children, based on parent ratings. Parents of children with primary snoring also had elevated stress ratings. According to the authors, the results support previous quality of life findings in older children and in samples with broader age ranges. The results appear in the November issue of the journal SLEEP.