WEDNESDAY, Jan. 31, 2024 (HealthDay News) -- The prevalence of mental health disorders exceeds 11 percent for children and youth aged 5 to 24 years, according to a study published online Jan. 31 in JAMA Psychiatry. Christian Kieling, M.D., Ph.D., from the Universidade Federal do Rio Grande do Sul in Porto Alegre, Brazil, and colleagues