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Percent known for tobacco use variables among cancer cases in 10 central cancer registries, 2011-2013. The counts for the tobacco use cigarette variable excluded 3 cases with blank values. The tobacco use other smoked variable excluded 3 blank values, the tobacco use smokeless variable excluded 3 blank values, and the tobacco use NOS variable excluded 4 blank values. *Smoked tobacco products other than cigarettes (eg, pipes, cigars, and kreteks). NOS indicates not otherwise specified.
