As many as 18 million Americans have sleep apnea--brief interruptions of breathing during sleep. Four percent of middle-aged men and 2 percent of middle-aged women have sleep apnea along with excessive daytime drowsiness. In a given night, the number of involuntary breathing pauses, called apneic events, may be as high as 20 to 30 or more per hour. Source: National Center on Sleep Disorders Research, National Institutes of Health

 
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