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In a previous study, 66% of 374 adults with autism spectrum disorder (ASD) self-reported suicidal ideation, and 35% self-reported plans or attempts (NEJM JW Psychiatry Sep 2014 and Lancet Psychiatry 2014; 1:142). To obtain more-objective data, investigators used data from the universal healthcare system in Taiwan, which included 5,618 participants (age range, 12–29; 78% male) with ASD, but no previous suicide attempts, diagnosed by board-certified psychiatrists, and 22,472 matched controls without ASD diagnoses or suicide attempts. Across multiple comorbid diagnostic categories, people with ASD had higher rates than controls: 25.3% versus 1.3% had attention-deficit/hyperactivity disorder, 42.8% versus 0.7% with intellectual disability, 16.0…