Kate Lunau looks at the reasons behind the rapid rise in ADHD diagnosis rates for MacLeans:
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Any visitor to North Carolina and California will know that the two states have their differences. The former is a typically “red state”; California is staunchly “blue.” Each has certain geographic, ethnic and cultural peculiarities, different demographic makeup, family income levels, and more. Yet perhaps the most surprising divide, one many wouldn’t expect, is that North Carolina appears to be a hotbed for attention deficit hyperactivity disorder, or ADHD—especially when compared to California. A child who lived in North Carolina instead of California in 2007, according to U.S. academics Stephen Hinshaw and Richard Scheffler, was 2½ times more likely to be diagnosed.
In their forthcoming book The ADHD Explosion, Hinshaw and Scheffler—a psychologist and health economist, respectively, at the University of California at Berkeley—examine the causes behind the startling and rapid rise in diagnosis rates of ADHD, a neurobehavioural disorder that has somehow become epidemic.