title: [Quantitative concepts in the evaluation of diagnostic tests with reference to their suitability in diagnosis and therapy].
abstract: In the paper the necessity of quantitative data describing the efficiency of diagnostic and therapeutic measures is pointed out. Possible parameters of diagnostic (or therapeutic) effectiveness are indication lists, decision trees (diagnostic strategies), sensitivity, specificity, accuracy, predictive value and ROC-characteristics. These quantities and the mathematical relations between them are described. For chest x-ray screening the sensitivity is 0.84, specificity 0.90 and the respective predictive values are only 0.34% for Ca and 0.13% for tuberculosis.
mesh_terms: D003933:Diagnosis; D006801:Humans; D008175:Lung Neoplasms / Q000517:prevention & control; D008400:Mass Chest X-Ray; D008433:Mathematics; D013812:Therapeutics; D014397:Tuberculosis, Pulmonary / Q000517:prevention & control
vernacular_title: Quantitative Konzepte zur Beurteilung diagnostischer Tests im Hinblick auf deren Eignung für Diagnostik und Therapie.