Prevalence
➢ Autism affects 1 in 150 children.
➢ One in 94 boys are affected by the disorder.
➢ Boys are four times more likely than girls to have the diagnosis.
➢ The recurrence risk estimate (the likelihood that the next child will be diagnosed with autism) is 8.6%.
➢ If the first child with autism is a boy, the recurrence risk is 7%.
➢ If the first child with autism is a girl, the recurrence risk is 14.5%.
➢ When there are two or more children with autism in a family, the risk of recurrence is approximately 35%.