07 November 2019

Association of relative age in the school year with diagnosis of intellectual disability, attention-deficit/hyperactivity disorder, and depression

This research examined the association between relative age in the school year and incidence of intellectual disability, attention-deficit/hyperactivity disorder, and depression. The study found that  relatively young children, i.e. those who were the youngest group in a school year, were 1.3 times more likely than the oldest quarter of children in the school year 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. So relative youth status in the school year is associated with an increased risk of diagnosis of ADHD, intellectual disability, and depression in childhood.