One percent to 4 percent of all children have obstructive sleep apnea, but many go undiagnosed and untreated, reports U.S. News & World Report.

“One to 4 percent of all children have obstructive sleep apnea, but many go undiagnosed and untreated because people do not recognize the symptoms,” says Dr. Rochelle Goldberg, director of sleep medicine services at Main Line Health and an associate professor at Sidney Kimmel Medical College at Thomas Jefferson University in Philadelphia.

Further complicating matters is that some children with sleep apnea are misdiagnosed with attention deficit hyperactivity disorder because, unlike adults, disrupted sleep makes kids hyperactive, experts say.