Here are some basic statistics from the Centers for Disease Control and Prevention about ASD.
- About 1 in 68 children has been identified with autism spectrum disorder (ASD)
- ASD occurs in all racial, ethnic, and socioeconomic groups, but is more common in boys than in girls
- Parents who have a child with ASD have a 2%–18% chance of having a second child who is also affected
- ASD commonly co-occurs with other developmental, neurologic, chromosomal, and genetic conditions
- Research has shown that a diagnosis of autism at age 2 can be reliable, valid, and stable
- Many parents of children with ASD notice a developmental problem before their child’s first birthday. Concerns about vision and hearing were more often reported in the first year, and differences in social, communication, and fine motor skills were evident by 6 months