Philadelphia Statistics

Overall Prevalence of ASD per 1,000 eight-year-olds

2006            8.4 or about 1 in 120 eight-year-olds have ASD

2002            5.3 or about 1 in 190 eight-year-olds have ASD

Prevalence of ASD per 1,000 eight-year-olds by gender

2006             Boys     13.3            Girls     3.3            Ratio: 4:1

2002             Boys     8.7              Girls     1.8            Ratio: 4.8:1