Teen depression and suicide risk linked to late bedtimes and chronic sleep deprivation

A report from the Jan. 1, 2010 issue of the journal Sleep found a surprising link between the typically late bedtimes of teenagers and teen depression and suicide.

Parent-set bedtimes affect teen's mental state

Adolescents with parent-set bedtimes after midnight had a 24% increased incidence of depression and a 20% increase in suicidal thoughts compared to teens with a bedtime before 10 pm.

Most of the teens in the study reported adhering to the bedtimes their parents set for them, showing that it's up to parents to give appropriate guidelines for avoiding sleep deprivation.

Length of Sleep Matters for Adolescents

The length of sleep matters, too, according to the researchers. Teenagers who reported getting less than five hours of sleep a night had a 71% higher risk of depression and a 48% higher risk of suicidal thoughts than adolescents who got 8 hours or more of sleep.

The AASM (The American Academy of Sleep Medicine) recommends nine or more hours of sleep a night for adolescents.

The study was conducted by James E. Gangwisch, PhD, assistant professor at Columbia University Medical Center in New York, N.Y and colleagues and looked at over 15,000 teenagers' sleep habits and mental states. The teens in the study ranged from 12-17 years old.

Other studies indicate more benefits from increased teen sleep.

In previous studies, shorter sleep durations in children and teens have been linked to higher rates of obesity, school performance and general social well-being. And adolescents who don't get enough sleep due to insomnia are far more likely to develop mental health problems, including substance abuse.