Researchers at the Johns Hopkins Bloomberg School of Public Health contributed to a new U.S. Centers for Disease Control and Prevention (CDC) report that finds the prevalence of autism spectrum disorder (ASD) largely unchanged from two years ago, at one in 68 children (or 1.46 percent). Boys were 4.5 times more likely to be identified with ASD than girls, an established trend. The rate is one in 42 among boys and one in 189 among girls.
ASD is a developmental disorder characterized by social and communication impairments, limited interest and repetitive behaviors. Early diagnosis and intervention are important to improving learning and skills. Rates have been rising since the 1960s, but researchers do not know how much of this rise is due to more children being diagnosed with ASD or if actual cases are increasing or a combination of both. The CDC’s first prevalance report, which was released in 2007 and was based on 2000 and 2002 data, found that one in 150 children had ASD.
For this new report, the CDC collected data at 11 regional monitoring sites that are part of the Autism and Developmental Disabilities Monitoring (ADDM) Network in the following states: Arkansas, Arizona, Colorado, Georgia, Maryland, Missouri, New Jersey, North Carolina, South Carolina, Utah, and Wisconsin. The Maryland monitoring site is based at the Johns Hopkins Bloomberg School of Public Health.