biostudies-literatureLee CJInnovation Fund of the Alternative Funding Plan for the Academic Health Sciences Centres of OntarioCanadian Institutes of Health ResearchCIHRe70148https://www.ebi.ac.uk/biostudies/studies/S-EPMC12853243biostudies-literatureUnknown19(1)Autism and borderline personality disorder (BPD) are each associated with increased psychiatric emergency department (PsyED) use, yet the service impact of coexisting autism-BPD remains unclear. We conducted a retrospective chart review of 1027 PsyED visits by 345 autistic adults (2018-2020) at an urban Canadian psychiatric hospital to compare service patterns between those with and without a BPD diagnosis. Sociodemographics, presenting reasons, restraint use, and disposition were analyzed using mixed-effects logistic regression. BPD was documented in 33.5% of visits and in 11.0% of unique autistic individuals, more often in birth-assigned females. Among all autistic individuals' PsyED visits, an autism diagnosis was documented in 60.2% of their text-based charts. Furthermore, autism was dAutism research : official journal of the International Society for Autism ResearchPsychiatric Emergency Visits of Autistic Adults With or Without Documented Borderline Personality Disorder.PMC12853243GSB 171373CAM-20-005CAM-20-004Morra AJachyra PCourchesne VZaheer JLin HYBaharikhoob PMan LLYPace-Tonna CFrayne MLai MCLee CJCastelino CSawyer AAmeis SHLunsky YLuk VfalsePsychiatric Emergency Visits of Autistic Adults With or Without Documented Borderline Personality Disorder.Autism and borderline personality disorder (BPD) are each associated with increased psychiatric emergency department (PsyED) use, yet the service impact of coexisting autism-BPD remains unclear. We conducted a retrospective chart review of 1027 PsyED visits by 345 autistic adults (2018-2020) at an urban Canadian psychiatric hospital to compare service patterns between those with and without a BPD diagnosis. Sociodemographics, presenting reasons, restraint use, and disposition were analyzed using mixed-effects logistic regression. BPD was documented in 33.5% of visits and in 11.0% of unique autistic individuals, more often in birth-assigned females. Among all autistic individuals' PsyED visits, an autism diagnosis was documented in 60.2% of their text-based charts. Furthermore, autism was d2026-01-01T00:00:00Z2026 Jan2026-06-09T06:56:05.452Z2026-06-09T03:12:16.853ZS-EPMC128532434126309210.1002/aur.70148