Prevalence :

Autism is the most common of the Pervasive Developmental Disorders, affecting an estimated 1 in 150 births in the United States. Roughly translated, this means as many as 1.5 million Americans today are believed to have some form of autism. And this number is on the rise. Based on statistics from the U.S. Department of Education and other governmental agencies, autism is growing at a startling rate of 10-17 percent per year.

Rough estimates suggest as population of autism people in India as two million, US 1.5 million, China 1.1 million, UK 0.65 million, The Philippines half million, Thailand 0.18 million and Mexico about 0.15 million.

There are no reliable estimate for Nepal as autism is not known to many people. There is a lack of awareness amongst people and diagnosis on this is weak. ACN estimates autistic population lies between 10,000 to 50,000 in Nepal.

Autism knows no racial, ethnic, or social boundaries; family income levels; lifestyle choices; or educational levels, and can affect any family and any child. Although the overall incidence of autism is consistent around the globe, it is four times more prevalent in boys than in girls.