Understanding diagnostic tests. Part 1.

Understanding diagnostic tests. Part 1.

1. Methods in Epidemiologic, Clinical, and Operations Research–MECOR–program, American Thoracic Society/Asociación Latinoamericana del Tórax, Montevideo, Uruguay. 2. Divisão de Pneumologia, Instituto do Coração, Hospital das Clínicas Faculdade de Medicina, Universidade de São Paulo, São Paulo (SP) Brasil. 3. Department of Preventive Medicine, Keck School of Medicine, University of Southern Cali...

Understanding diagnostic tests. Part 2.

1. Methods in Epidemiologic, Clinical, and Operations Research–MECOR–program, American Thoracic Society/Asociación Latinoamericana del Tórax, Montevideo, Uruguay. 2. Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles (CA) USA. 3. Divisão de Pneumologia, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São...

Understanding diagnostic tests 1: sensitivity, specificity and predictive values.

UNLABELLED The usefulness of diagnostic tests, that is their ability to detect a person with disease or exclude a person without disease, is usually described by terms such as sensitivity, specificity, positive predictive value and negative predictive value. In this article, the first of the series, a simple, practical explanation of these concepts is provided and their use and misuse discussed...

part 2: positive and negative predictive values of diagnostic tests

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1 C 2 Diagnostic Tests