USA: August babies more likely to be diagnosed with ADHD at school

08 February 2019

Children who start school as the youngest in their year are far more likely to be diagnosed with ADHD, scientists say.

A study from Harvard University, published in The New England Journal of Medicine, shows that, in those states where the cut-off date for school enrolment is 1 September, children born in August are 30% more likely to receive an ADHD diagnosis compared with those born in September enrolled in the same grade.

Among the 407,000 elementary school children studied, no such differences were observed in states with different cut-off dates.

‘Our findings suggest the possibility that large numbers of kids are being overdiagnosed and overtreated for ADHD because they happen to be relatively immature,’ said study lead author Timothy Layton.

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