In a prospective study of over 1800 interviewed young Finnish twins, early-onset depressive disorders at age 14 significantly predicted daily smoking, smokeless tobacco use, frequent illicit drug use, frequent alcohol use and recurrent intoxication three years later, even among those adolescents who were not users at baseline.

For some children, sleep problems may result purely from poor sleep habits and inadequate sleep hygiene. However, for a small percentage of children, sleep problems might represent a pre-cursor or early symptom of a more serious emotional disorders, including anxiety and depression, according to a research abstract that will be presented on Monday at SLEEP 2008, the 22nd Annual Meeting of the Associated Professional Sleep Societies (APSS).

Young people with asthma are about twice as likely to suffer from depressive and anxiety disorders than are children without asthma, according to a study by a research team in Seattle.