More than a third sleep less than 7 hours

Bloomberg News / March 4, 2011

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NEW YORK — More than a third of Americans regularly sleep less than seven hours a night, affecting their ability to concentrate, according to the Centers for Disease Control and Prevention.

Short sleep duration was found among 35 percent of adults surveyed, and 48 percent reported snoring, an unhealthy behavior, according to a study in the journal Morbidity and Mortality Weekly Report yesterday. About 39 percent of respondents ages 25 to 54 reported sleeping less than seven hours in a day.

The most common side effect of sleep-related difficulties was loss of concentration, followed by trouble remembering, another report found. Most adults need seven to nine hours to avoid higher likelihood of illness and death, the Washington-based National Sleep Foundation said.

“Poor sleep habits, which include not scheduling enough time for sleep, can be assessed during general medical care visits and improved with effective behavioral changes,’’ the authors wrote in an editorial.