Lung Cancer Mortality Among Smokers and Never-Smokers in the United States

To the Editor: Lung cancer in never-smokers may be increasing in the United States.1 To further explore these temporal trends, we estimated lung cancer mortality from 1992 to 2011, by linking the National Longitudinal Mortality Study (NLMS)2 and Tobacco Use Supplements (TUS). The NLMS is a prospective study of mortality in combined samples of the civilian noninstitutionalized population.2 NLMS is managed by the Census Bureau and consists of...