The rate of smokeless tobacco use among middle- and high-school students did not change substantially overall between 2000 and 2011, a study showed. Use of such products in children aged 9 to 11 years and 12 to 14 years dropped by an average of 4.6% and 3.4% each year, respectively, but researchers found an increased rate among 15- to 17-year-olds. The findings, based on the CDC's National Youth Tobacco Survey, were published in the Journal of the American Medical Association.

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