The findings, published Nov. 28 in The New England Journal of Medicine, show that children born in August in those states are 30 percent more likely to receive an ADHD diagnosis, compared with their slightly older peers enrolled in the same grade.

источник: news.harvard.edu/gazette/story/2018/11/when-starting-school-younger-children-are-more-likely-to-be-diagnosed-with-adhd-study-says/