A recent study of nearly 10,000 junior and senior High school students in Japan shows that the mental Health status of those who sleep less than 7 hours or more than 9 hours per night was less than those who sleep between 7 to 9 hours at night. The study also showed an association between poor mental health and complaints of Insomnia. Therefore it is important to promote mental health care and good sleep habits among adolescents.
J Clin, Psychiatry 2007 Sep; 68(9):1426-35