A study in the Aug. 1 issue of the journal Sleep examined obstructive sleep apnea among siblings; it found a high “sibling risk” of OSA in both boys and girls.The study group consisted of siblings born between 1978 and 1986; follow-up data were gathered from 1997 to 2004. Hospital records were analyzed for the entire pediatric population in Sweden – 2.7 million children.Children 18 years of age