• J P Pierce, W S Choi, E A Gilpin, A J Farkas, and C C Berry.
• Cancer Prevention and Control Program, Cancer Center, University of California, San Diego, La Jolla 92093-0901, USA. jppierce@ucsd.edu
• JAMA. 1998 Feb 18; 279 (7): 511-5.

ContextWhether tobacco advertising and promotion increases the likelihood that youths will begin smoking has important public policy implications.ObjectiveTo evaluate the association between receptivity to tobacco advertising and promotional activities and progress in the smoking uptake process, defined sequentially as never smokers who would not consider experimenting with smoking, never smokers who would consider experimenting, experimenters (smoked at least once but fewer than 100 cigarettes), or established smokers (smoked at least 100 cigarettes).DesignProspective cohort study with a 3-year follow-up through November 1996.Setting And ParticipantsA total of 1752 adolescent never smokers who were not susceptible to smoking when first interviewed in 1993 in a population-based random-digit dial telephone survey in California were reinterviewed in 1996.Main Outcome MeasureBecoming susceptible to smoking or experimenting by 1996.ResultsMore than half the sample (n=979) named a favorite cigarette advertisement in 1993 and Joe Camel advertisements were the most popular. Less than 5% (n=92) at baseline possessed a promotional item but a further 10%(n=172) were willing to use an item. While having a favorite advertisement in 1993 predicted which adolescents would progress by 1996 (odds ratio [OR] = 1.82; 95% confidence interval [CI], 1.04-3.20), possession or willingness to use a promotional item was even more strongly associated with future progression (OR=2.89; 95% CI, 1.47-5.68). From these data, we estimate that 34% of all experimentation in California between 1993 and 1996 can be attributed to tobacco promotional activities. Nationally, this would be over 700000 adolescents each year.ConclusionThese findings provide the first longitudinal evidence to our knowledge that tobacco promotional activities are causally related to the onset of smoking.

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