In the United States, developmental disabilities affect approximately 17% of children aged <18 years, resulting in substantial financial and social costs.
Prevalence of four developmental disabilities among children aged 8 years--Metropolitan Atlanta Developmental Disabilities Surveillance Program, 1996 and 2000.
Division of Birth Defects and Developmental Disabilities, National Center on Birth Defects and Developmental Disabilities, CDC, Atlanta, Georgia 30333, USA. tfk2@cdc.gov
