Root A, Brown JP, Forbes HJ, et al. - Researchers examined the association between relative age in the school year and intellectual disability, attention-deficit/hyperactivity disorder (ADHD), and depression incidence via a cohort study of 1,042,106 children in the UK Clinical Practice Research Datalink, which incorporates data from more than 700 general practices. Compared with the oldest quarter of children in the school year, relatively young children were noted to be at 1.3 times more likely to be diagnosed with intellectual disability, 1.4 times more likely to be diagnosed with ADHD, and 1.3 times more likely to be diagnosed with depression. These findings emphasize the necessity for effective interventions to minimize the negative intellectual ability and mental and physical health consequences of the relatively young.