Steinhausen HC, et al. - Researchers examined a complete nationwide birth cohort across the entire period of childhood and adolescence for incidences, cumulative incidence rates, and risk factors of diagnosed mental disorders. They followed the entire cohort of all children born in 1995 up to December 31, 2013 using nationwide Danish registries. In adolescence, an increase in the incidences of any mental disorder, substance use disorders, depression, and anxiety disorders was noted. However, increased incidences for autism spectrum disorders, attention-deficit/hyperactivity disorder, conduct disorder, and tic disorder was noted during childhood and their incidence decreased thereafter. Incidence rates of any mental disorders, substance use disorders, autism spectrum disorders, ADHD, conduct disorder, and tic disorder were higher among males. Risks for depressive, anxiety, obsessive-compulsive, and eating disorders were higher among females. They identified several other risk and protective factors for any mental disorder. At age 18 years, the cumulative incidence rate amounted to 11.02% for any mental disorder.