Cumulative incidence and relative risk of sleep problems among children and adolescents with newly diagnosed neurodevelopmental disorders: A nationwide register‐based study

We estimated the absolute and relative risk of sleep problems in children and adolescents with newly diagnosed neurodevelopmental disorders. This was a population‐based cohort study of individuals born in Denmark in 1993–2014 and followed in nationwide registers in 2011–2016. We estimated the 5‐year cumulative incidence of sleep problems in incident cases of attention‐deficit/hyperactivity disorder (ADHD; n = 12,844), autism spectrum disorder...