In 2018, the CDC determined that approximately 1 in 59 children are diagnosed with an autism spectrum disorder (ASD).

Boys are four times more likely to be diagnosed with autism than girls are.

Most children were still being diagnosed after age four, though autism can be reliably diagnosed as early as age 2.

31% of children with ASD have an intellectual disability (intelligence quotient [IQ] <70), 25% are in the borderline range (IQ 71–85), and 44% have IQ scores in the average to above average range (i.e., IQ >85). 

There is no medical detection for autism.