Association of Psychiatric and Neurologic Comorbidity With Mortality Among Persons With Autism Spectrum Disorder in a Danish Population.

Importance: Increased mortality has been reported among persons with autism spectrum disorder (ASD), especially among those who also have the comorbid condition of epilepsy or intellectual disability. The effects of psychiatric and neurologic comorbidity on mortality among persons with ASD have not been rigorously examined in large, population-based studies.

Objective: To investigate the mortality patterns among persons with ASD overall and to assess the associations of comorbid mental, behavioral, and neurologic disorders with mortality among persons with ASD.