Randomised Controlled Trial of Melatonin for Delayed Sleep Phase Disorder

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Delayed Sleep Phase Disorder (DSPD) is a sleep disorder affecting 7-16% of adolescents and young adults. It is associated with poor health and impaired academic and social functioning. We will test in a randomised controlled trial whether the hormone melatonin can be used as a treatment for DSPD. We will also assess whether genetic factors are linked to treatment outcome. The study will provide a much-needed standardised diagnostic and treatment approach for DSPD.