[Evidence-based cardiology: practical applications from epidemiology. III. Diagnostic capacity of a clinical test]. / Cardiología "basada en la evidencia": Aplicaciones prácticas de la epidemiología. III. Capacidad diagnóstica de una prueba clínica.

This article reviews different characteristics of validity in a clinical diagnostic test. In particular, we emphasize the likelihood ratio as an instrument that facilitates the use of epidemiologic concepts in clinical diagnosis.