1 in 500 to 1 in 2,500 (NIMH); 1-in-1000 to 2-in-1000, depending on diagnostic criteria ... see also overview of Autism.
approx 1 in 500 or 0.20% or 544,000 people in USA [Source statistic for calcuation: "1 in 500 to 1 in 2,500 (NIMH); 1-in-1000 to 2-in-1000, depending on diagnostic criteria" -- see also general information about data sources]
Ophanet, who are a consortium of European partners, currently defines a condition rare when if affects 1 person per 2,000. They list Autism as a "rare disease". More information about Autism is available from Orphanet
3,000 new cases in the USA 2001 (BBC News, 2002) ... see also overview of Autism.
approx 1 in 90,666 or 0.00% or 3,000 people in USA [Source statistic for calcuation: "3,000 new cases in the USA 2001 (BBC News, 2002)" -- see also general information about data sources]
3,000 per year, 250 per month, 57 per week, 8 per day, 0 per hour, 0 per minute, 0 per second. [Source statistic for calculation: "3,000 new cases in the USA 2001 (BBC News, 2002)" -- see also general information about data sources]
Autism affects an estimated 10 to 20 of every 10,000 people, depending on diagnostic criteria used, and strikes males about four times more often than females. (Source: excerpt from NINDS Autism Information Page: NINDS) ... Autism affects an estimated 10 to 20 of every 10,000 people, depending on the diagnostic criteria used. Most estimates that include people with similar disorders are two to three times greater. (Source: excerpt from Autism Fact Sheet: NINDS) ... Emerging in childhood, it affects about 1 or 2 people in every thousand and is three to four times more common in boys than girls. (Source: excerpt from Autism: NIMH)
The following statistics relate to the prevalence of Autism:
The following statistics relate to the incidence of Autism:
16 MEDICAL BOOKS ONLINE! Review excerpts from medical books online, free, without registration, for more information about the prevalence and/or incidence of Autism.
The causes of autistic disorder remain unclear but are thought to include psychological, physiologic, and sociological factors. Much evidence has accumulated to suggest a biological substrate. The parents of a child who’s autistic may appear distant and unaffectionate. However, because children who are autistic are unresponsive or respond with rigid, screaming resistance to touch and attention, parental remoteness may be merely a frustrated, helpless reaction to this disorder, not its cause.
Some children who are autistic show abnormal but nonspecific EEG findings that suggest brain dysfunction, possibly resulting from trauma, disease, or a structural abnormality. Autistic disorder has also been associated with maternal rubella, untreated phenylketonuria, tuberous sclerosis, anoxia during birth, encephalitis, infantile spasms, and fragile X syndrome. Studies have established a link with abnormalities in neurotransmitters, including (in some cases) increased dopamine and increased serotonin. There appears to be a genetic component as well; between 2% and 4% of siblings of those with autism also had autistic disorders at a rate higher than the general population.
Autistic disorder is rare, affecting 4 to 5 children per 10,000 births. It affects three to four times more boys than girls.
Source: Professional Guide to Diseases (Eighth Edition), 2005
The term 'prevalence' of Autism usually refers to the estimated population of people who are managing Autism at any given time. The term 'incidence' of Autism refers to the annual diagnosis rate, or the number of new cases of Autism diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.
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