Chronic insomnia affects nearly one out of five adults and is a risk factor for depression, substance abuse, impaired waking function and sensitivity to pain.1,2[/caption] Studies show that 65% to 90% of adult patients and 90% of children with major depression have some kind of sleep problem. More than one-half of insomnia cases are related to depression, anxiety or psychological stress. Insomnia is caused by difficulty falling asleep, difficulty staying asleep or waking up too early in the morning. About one in five insomnia sufferers have obstructive sleep apnea (OSA). Sleep apnea and its symptoms have been shown to be associated with major depression regardless of factors such as weight, age, sex or race. A large study by the Centers for Disease Control and prevention found 63% of patients with obstructive sleep apnea also have depression.3 Treating insomnia or other sleep problems may help alleviate symptoms of mental health issues.