title: Sensitivity, specificity and predictive values: a graphical approach.
abstract: The relation between sensitivity, specificity and prevalence is illustrated by means of a graphical device, applied to two diagnostic questions on gastroenteritis in children. The relation between the predictive values and the prevalence is also illustrated graphically.
mesh_terms: D001699:Biometry / Q000379:methods*; D002648:Child; D003933:Diagnosis; D003951:Diagnostic Errors; D004812:Epidemiologic Methods; D005759:Gastroenteritis / Q000175:diagnosis / Q000453:epidemiology; D006801:Humans; D009017:Morbidity; D011336:Probability