Prognostic studies for health care decision making

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