Race, Ethnicity, and Income Factors in ADHD Diagnosis
The CDC, analyzing trends in children age 5 to 17, says that between 1998 and 2009:
ADHD prevalence increased to 10.3% for children with family incomes of less than 100% of the poverty level, up from 7%, and to 10.6% for those with family incomes between 100% and 199% of the poverty level, compared to 7% in the earlier period.
ADHD prevalence rose from 8.2% to 10.6% for non-Hispanic whites during the period studied, and from 5.1% to 9.5% for non-Hispanic black youngsters.
ADHD frequency rose to 10% in the Midwest and South. The frequency of ADHD in these two regions was higher than in the Northeast and West.
Mexican-American children consistently have had lower percentages of ADHD than other racial or ethnic groups.
ADHD frequency was higher among boys than girls. For boys, it increased from 9.9% in the 1998-2000 period to 12.3% in 2007-2009. In girls, frequency rose from 3.6% to 5.5%.
ADHD estimates in the report are based on a survey of parents who reported if their child had ever received a diagnosis of ADHD, the CDC says.