The Encyclopedia of Sleep and Sleep Disorders (3rd ed.)

According to the National Center on Sleep Disorders Research of the National Institutes of Health, 70 million American adults suffer from some kind of sleep disorder. Disorders such as sleep apnea have been linked to an increased likelihood of stroke, hypertension, or heart failure. It is now documented that sleep deprivation can facilitate mistakes or incidents at work; mood swings; an increased chance of obesity; and, drowsy driving, a serious condition often associated with traffic accidents