Mar, JavierLarrañaga, IgorIbarrondo, OliverGonzález‑Pinto, AnaHayas, Carlota lasFullaondo, AneIzco‑Basurko, IrantzuAlonso Caballero, JordiZorrilla, IñakiVilagut Saiz, Gemma, 1975-Mateo‑Abad, Maiderde Manuel, Esteban2023-03-132023-03-132023Mar J, Larrañaga I, Ibarrondo O, González-Pinto A, las Hayas C, Fullaondo A, et al. Incidence of mental disorders in the general population aged 1–30 years disaggregated by gender and socioeconomic status. Soc Psychiatry Psychiatr Epidemiol. 2023 Jun;58(6):961-71. DOI: 10.1007/s00127-023-02425-z1433-9285http://hdl.handle.net/10230/56178Includes supplementary materials for the online appendix.The objective of this study was to estimate the incidence and age of onset of mental disorders diagnosed by gender and socioeconomic status (SES) in children, adolescents, and young adults up to 30 years of age in the whole population of the Basque Country (Spain). All mental health diagnoses documented in Basque Health Service records from 1 January 2003 to 31 December 2018, were classified into eight clusters: anxiety, attention deficit hyperactivity disorder (ADHD), conduct disorders, depression, psychosis/personality disorders, substance use, eating disorders, and self-harm. We calculated incidence and cumulative incidence for each cluster, disaggregated by gender, and socioeconomic status (SES). Poisson regression analyses were performed. Overall, 9,486,853 person-years of observation were available for the 609,281 individuals included. ADHD and conduct disorders were diagnosed in the first decade, anxiety and depression disorders in the second and third decades, and psychosis/personality and substance use in the third. The cumulative incidence at 18 years of age for any type of disorder was 15.5%. The group with low SES had a statistically significantly higher incidence of all eight clusters. The incidence of ADHD, conduct disorders, depression, psychosis/personality disorders, and substance use was higher in males and that of anxiety, eating disorders and self-harm was higher in females. The incidence of mental disorders is high among children, adolescents, and young adults in the Basque Country underlining the need for preventive interventions. Marked differences by gender and SES highlight mental health inequalities, especially for depression and psychosis in low SES males.application/pdfengThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.info:eu-repo/semantics/articlehttp://dx.doi.org/10.1007/s00127-023-02425-zAdolescentMental disordersHealthcare disparitiesSocioeconomic factorsIncidenceAdolescent psychiatryChild psychiatryinfo:eu-repo/semantics/openAccess