Smokeless Tobacco and Aerodigestive Tract Cancers: Recent Research Directions

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Though smokeless tobacco, which includes chewing tobacco and snuff, was the most common form of tobacco used at the turn of the century (1), its use declined over subsequent decades. In the mid-1970s, however, its popularity again rose, leading to a 56% increase in snuff use from 1970 to 1985, accounted for by moist snuff, and a 36% increase in chewing tobacco, attributed to loose-leaf tobacco (2). With the exception of a leveling off around 1987, this upward trend in use has continued (3).