In just 10 years the number of children diagnosed with attention deficit/hyperactivity disorder, or ADHD, rose dramatically, a large new study suggests.
Overall, about 5 percent of nearly 843,000 kids ages 5 to 11 were diagnosed between 2001 and 2010 with the condition that can cause impulsive behavior and trouble concentrating. But during that time, rates of new ADHD diagnoses skyrocketed 24 percent—jumping from 2.5 percent in 2001 to 3.1 percent in 2010.
That’s according to a comprehensive review of medical records for children who were covered by the Kaiser Permanente Southern California health plan. Rates rose most among minority kids during the study period, climbing nearly 70 percent overall in black children, and 60 percent among Hispanic youngsters, according the study published in JAMA Pediatrics. Among black girls, ADHD rates jumped 90 percent.
Rates remained highest in white children, climbing from 4.7 percent to 5.6 percent during the study period.
ADHD is one of the most commonly diagnosed childhood disorders. Experts estimate that anywhere from 4 percent to 12 percent of school-age children are affected, many of whom continue to suffer from the disorder into adulthood.
Rates of diagnosis in the new study were greater in families with higher incomes, with nearly three-quarters of kids with ADHD coming from families that earned more than $50,000 a year.
“Higher rates of ADHD observed in affluent, white families likely represent an effort by these highly educated parents to seek help for their children who may not be fulfilling their expectations for schoolwork,” [study author Dr. Darios] Getahun and his co-workers write.
Boys still outnumber girls 3 to 1 in ADHD diagnoses, but the gap appears to be closing among black girls.
There was no change in the rate among Asian kids, but Getahun suspects this may have something to do with culture. Asians, as a rule, have been less likely to use mental health services and are more likely to discontinue therapy despite having equal access to care, Getahun says.