Abstract
Children and adolescents with autism spectrum disorder and/or an intellectual disability (ASD/ID) are psychiatrically hospitalized at disproportionately higher rates than youth without ASD/ID. Despite this, few studies have compared the clinical courses of youth with and without ASD/ID in inpatient (IP) child and adolescent psychiatry (CAP) settings. This study used a cross-sectional design of all youth (M = 14.0 years, SD = 2.6 years) admitted to an urban IP unit between 2018 and 2021 to examine differences between ASD/ID and non-ASD/ID youth across dimensions of sociodemographic and psychiatric history and clinical course. 1101 Patients were included in the study and 170 (15.4%) had a history of ASD/ID. ASD/ID youth were more likely to be younger, be male, have histories of violence, and on average have more prior hospitalizations and existing psychotropic prescriptions than their non-ASD/ID counterparts. ASD/ID youth were less likely than their non-ASD/ID peers to be admitted for suicidality and more likely to be admitted for aggression; they had longer average lengths of stay, received more IP emergency medications for agitation, and experienced greater polypharmacy at discharge. The IP psychiatric clinical course of ASD/ID youth differs from that of non-ASD/ID youth, suggesting that ASD/ID youth often present to IP settings with externalizing symptoms. Findings highlight the importance of clinical strategies tailored to the unique needs of ASD/ID youth to improve their care in general IP CAP settings.