Progression to Established Smoking Among US Youths
Paul D. Mowery, MA,
Matthew C. Farrelly, PhD,
M. Lyndon Haviland, DrPH,
Julia M. Gable, MS and
Henry E. Wells, MS
Paul D. Mowery, Matthew C. Farrelly, Julia M. Gable, and Henry E. Wells are with RTI International, Research Triangle Park, NC. M. Lyndon Haviland is with the American Legacy Foundation, Washington, DC.

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FIGURE 1 Smoking stage distribution of US adolescents who had at least tried a cigarette, by age: 19992000 National Youth Tobacco Surveys.
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Copyright © 2004 by the American Public Health Association