TY - JOUR Y1 - 2022/04/29/ TI - Autism spectrum disorders as a risk factor for adolescent self-harm: a retrospective cohort study of 113,286 young people in the UK PB - BMC N1 - This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ IS - 1 KW - Science & Technology KW - Life Sciences & Biomedicine KW - Medicine KW - General & Internal KW - General & Internal Medicine KW - Child and adolescent mental health KW - Epidemiology KW - Autism spectrum disorders KW - Education KW - Data linkage KW - EMERGENCY-DEPARTMENT KW - PSYCHIATRIC-DISORDERS KW - SUICIDE IDEATION KW - MENTAL-HEALTH KW - CHILDREN KW - PREVALENCE KW - ADULTS KW - YOUTH KW - PRESENTATIONS KW - MORTALITY ID - discovery10149188 N2 - Background: Individuals with autism spectrum disorder (ASD) are at particularly high risk of suicide and suicide attempts. Presentation to a hospital with self-harm is one of the strongest risk factors for later suicide. We describe the use of a novel data linkage between routinely collected education data and child and adolescent mental health data to examine whether adolescents with ASD are at higher risk than the general population of presenting to emergency care with self-harm. Methods: A retrospective cohort study was conducted on the population aged 11?17 resident in four South London boroughs between January 2009 and March 2013, attending state secondary schools, identified in the National Pupil Database (NPD). Exposure data on ASD status were derived from the NPD. We used Cox regression to model time to first self-harm presentation to the Emergency Department (ED). Results: One thousand twenty adolescents presented to the ED with self-harm, and 763 matched to the NPD. The sample for analysis included 113,286 adolescents (2.2% with ASD). For boys only, there was an increased risk of self-harm associated with ASD (adjusted hazard ratio 2·79, 95% CI 1·40?5·57, P<0·01). Several other factors including school absence, exclusion from school and having been in foster care were also associated with a higher risk of self-harm. Conclusions: This study provides evidence that ASD in boys, and other educational, social and clinical factors, are risk factors for emergency presentation with self-harm in adolescents. These findings are an important step in developing early recognition and prevention programmes. AV - public JF - BMC Medicine EP - 14 A1 - Widnall, Emily A1 - Epstein, Sophie A1 - Polling, Catherine A1 - Velupillai, Sumithra A1 - Jewell, Amelia A1 - Dutta, Rina A1 - Simonoff, Emily A1 - Stewart, Robert A1 - Gilbert, Ruth A1 - Ford, Tamsin A1 - Hotopf, Matthew A1 - Hayes, Richard D A1 - Downs, Johnny UR - https://doi.org/10.1186/s12916-022-02329-w VL - 20 ER -