A study of trends in the diagnosis of ADHD in Kaiser Permanente Southern California Health plan medical records finds that the rate of diagnosis from January 1, 2001 through December 31, 2010 rose by 24%. There was a disproportionately high rate of diagnosis among white children. Results were published online by JAMA Pediatrics on January 21, 2013.
Of further interest:
ADHD in kids jumps 24 percent in a decade, study shows (NBC News)