Born in August - More Likely to Have ADHD
Here is the graph that shows how the birth month of August really stands out:
|Above copied from|
New England Journal of Medicine
It is actually not August that is special. The number of ADHD cases for children born in August is really no different from those in the previous months of June and July. What makes August extraordinary are the much lower number of cases for children born in September, October, November, December.
In the United States, children start school in September so there is usually a cutoff date for requiring children to enter kindergarten. If a child is born before September 1, that child must enroll in kindergarten after his or her 5th birthday. Children born in the months of September, October and November are therefore often the oldest in their class while those born in August are often the youngest. Thus, it is possible to have almost a year difference in age between two kids in the same elementary class. As a child once and now as a parent, I know that a difference of one year in age can count a lot in terms of how a child behaves.
The study does not conclude that there is ADHD misdiagnosis. However, the fact that children born during the "ber" months are less likely to be diagnosed with ADHD raises this question.