title: [Critical reading of analytical observational studies].
abstract: Analytical observational studies provide very important information about real-life clinical practice and the natural history of diseases and can suggest causality. Furthermore, they are very common in scientific journals. The aim of this article is to review the main concepts necessary for the critical reading of articles about radiological studies with observational designs. It reviews the characteristics that case-control and cohort studies must have to ensure high quality. It explains a method of critical reading that involves checking the attributes that should be evaluated in each type of article using a structured list of specific questions. It underlines the main characteristics that confer credibility and confidence on the article evaluated. Readers are provided with tools for the critical analysis of the observational studies published in scientific journals.
authors.affiliation: Unidad Clínica de Diagnóstico por Imagen, Hospital Universitario Puerta del Mar, Cádiz, España.
authors.forename: C
authors.initials: C
authors.lastname: García Villar
authors.affiliation: Medicina Interna, Hospital Universitario Virgen del Rocío, Sevilla, España. CIBERESP-IBIS, Fundación Enebro. Electronic address: ignacio.marin.sspa@juntadeandalucia.es.
authors.forename: I
authors.initials: I
authors.lastname: Marín León
mesh_terms: D006801:Humans; D064887:Observational Studies as Topic; D010506:Periodicals as Topic; D011871:Radiology; D011932:Reading; D012107:Research Design
keywords: Case-control studies; Casos y controles; Cohortes; Cohorts; Estudios observacionales; Evidence-based medicine; Medicina basada en evidencia; Oservational studies