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Understanding autism
Understanding autism

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Prevalence

An estimate of the number of cases of a condition within a population at a particular time. Prevalence is estimated by identifying how many people in a population sample have been diagnosed with the condition, or who would in principle meet the diagnostic criteria. Prevalence (e.g. of autism) does not necessarily indicate how many people have the condition: cases may go undetected due to factors such as low cultural awareness or limited availability of diagnostic services.

» Glossary