Number needed to treat: a useful statistic to evaluate the impact of an intervention

Abstract

1. Methods in Epidemiologic, Clinical, and Operations Research–MECOR–program, American Thoracic Society/Asociación Latinoamericana del Tórax, Montevideo, Uruguay. 2. Instituto Nacional de Enfermedades Respiratorias, Ciudad de Mexico, Mexico. 3. Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA. 4. Divisão de Pneumologia, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo (SP) Brasil. a. http://orcid.org/0000-0002-1132-5308; b. http://orcid.org/0000-0001-5742-2157; c. http://orcid.org/0000-0001-6548-1384 PRACTICAL SCENARIO