More than 1 in 4 adults and nearly 1 in 10 youth use tobacco, according to findings from the Population Assessment of Tobacco and Health (PATH) Study, published online ahead of print in the New England Journal of Medicine. The PATH Study, established in 2011 through collaboration between the National Institutes of Health’s National Institute on Drug Abuse and the U.S. Food and Drug Administration’s Center for Tobacco Products, is a uniquely large, nationally representative longitudinal study designed to examine tobacco use behaviors and health among the U.S. population over multiple years of follow-up. The PATH Study is being conducted by Westat of Rockville, Md., with Roswell Park Comprehensive Cancer Center as the scientific lead.