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This is the VOA Special English Health Report. "Sleep-disordered breathing" is a term for a group of conditions that can interfere with normal breathing while people sleep. These include snoring, mouth-breathing and sleep apnea. Sleep-disordered breathing can do more than just leave people feeling tired the next day. It can also affect people's health. In children the effects can include behavioraland emotional problems. In a new study, researchers asked parents about their children's breathing from when they were babies up to about age six. The parents also answered questions about behavior at ages four and seven. The study involved about eleven thousand children.