Diagnostic criteria
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Diagnostic criteria are a set of signs, symptoms, and tests used to determine the diagnosis of a person. Diagnostic criteria may be broad to accurately identify as many people with the condition as possible if the signs and symptoms of a disease, or symptom or progression severity, varies from person to person. Alternatively, there may be a single diagnostic test, such as a genetic test, that can confirm or establish a diagnosis. Ideally diagnostic criteria are validated through research studies.

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