Author Interviews, Autism, Cannabis, JAMA, Pediatrics / 28.05.2021 Interview with: Daimei Sasayama, M.D., Ph.D. Department of Psychiatry Shinshu University What is the background for this study? Response: The diagnosis of autism spectrum disorder (ASD) is increasing worldwide. A 2016 US survey reported a prevalence of 1.85% in 8-year-olds, and a birth cohort study in Denmark reported that the future cumulative incidence of ASD could exceed 2.8%. Our recent regional cohort study in Japan reported an even higher cumulative incidence of 3.1%. So we examined whether the cumulative incidence in our regional cohort represents the nationwide incidence in Japan. (more…)