Highly variable sleep schedules predict an elevated threat for suicide independent of depression in actively suicidal young adults, according to a investigation abstract presented Tuesday, June 8, 2010, in San Antonio, Texas, at SLEEP 2010, the 24th annual meeting of the Associated Professional Sleep Societies LLC.Results indicate that a sample of actively suicidal undergraduate students had a delayed mean bedtime of 2:08 a.m.; restricted total sleep time of 6.3 hours; and very variable sleep schedules, with time of mean sleep onset different by three several hours and time of sleep offset different by 2.8 several hours. Nonetheless, accounting for baseline depression severity, sleep variability was the only sleep measurement to individually predict increases in suicidal risk at one week and three weeks. Sleep irregularity also was the only sleep-related variable to predict greater mood lability, which in turn predicted elevated suicidal symptoms.
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