Researchers from North Carolina State University looked at the rates of ADHD diagnosis and treatment in children from 1996 to 2006 and found large discrepancies based on their dates of birth. They found that children born just after the cut-off date for their academic year group were 25 per cent less likely to be diagnosed as having ADHD than children born just before the cutoff.
The report says, 'The relative immaturity of these young-for-grade children may be mistaken as ADHD, due to the nature of the diagnostic guidelines that suggest a comparison with a child's peers ... ADHD is an underlying neurological condition and incidence rates should not change dramatically from one birth date to the next.'
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