In landmark FDA tobacco study, e-cig questions likely to linger

The U.S. Food and Drug Administration is poised to release initial data from a landmark study into how Americans use tobacco products, but researchers expect many key questions about e-cigarettes to remain unanswered. The five-year Population Assessment of Tobacco and Health (PATH) Study of about 46,000 people, begun in 2011, is expected to provide a wealth of data about smoking behavior that could shape regulations ranging from warning labels and advertising restrictions to new product approvals. "It is going to provide the most fine-grain, comprehensive, highest quality data on tobacco use that has ever been collected in the United States," said Stanton Glantz, a tobacco control expert at the University of California, San Francisco. The FDA gained authority under a 2009 law to regulate cigarettes, smokeless tobacco and roll-your-own tobacco.



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