Late-night teens 'face greater depression risk'
 Teenagers need at least nine hours sleep a night, say experts |
Going to bed earlier protects teenagers against depression and suicidal thoughts, New York research suggests.
Of 15,500 12 to 18-year-olds studied, those who went to bed after midnight were 24% more likely to have depression than those who went before 2200.
And those who slept fewer than five hours a night had a 71% higher risk of depression than those who slept eight hours, the journal Sleep reports.
It is estimated 80,000 UK children and young people have depression.
