Columbia University Medical Center
NewYork-Presbyterian Hospital The University Hospital of Columbia and Cornell
January 3, 2010

Earlier bedtimes may help protect teens from depression and suicidal thoughts, says a U.S. study published Friday.

Researchers analyzed data from 15,659 U.S. students in Grades 7 to 12 and their parents. Participants were surveyed from 1994 to 1996 for the study by James Gangwisch, a professor of psychiatry at Columbia University Medical Center in New York, and his colleagues.

On average, the teenagers said they got seven hours and 53 minutes of shut-eye a night, compared with the nine or more hours recommended for adolescents by the American Academy of Sleep Medicine, the team reported in the journal Sleep.

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