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  Vol. 151 No. 3, March 1997 TABLE OF CONTENTS
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Do Cigarette Warning Labels Reduce Smoking?

Paradoxical Effects Among Adolescents

Thomas N. Robinson, MD, MPH; Joel D. Killen, PhD

Arch Pediatr Adolesc Med. 1997;151(3):267-272.


Abstract



Objective
To examine the association between adolescents' knowledge of cigarette warning labels and actual smoking behavior.

Design
Cohort analytic study.

Setting
Four public high schools in northern California.

Subjects
Seventeen hundred forty-seven ninth graders (mean age, 14.9 years). Students from 2 of the schools (n=803) were observed for approximately 3 months.

Main Outcome Measures
Self-reported knowledge of warning labels was assessed at baseline. Self-reports of smoking behavior were completed at baseline and at follow-up.

Results
Greater knowledge of cigarette package warning labels was significantly associated with higher levels of smoking. Knowledge of warning labels on magazine and billboard advertisements did not differ significantly by level of smoking. In the longitudinal sample, greater knowledge of cigarette package warning labels was significantly associated with a subsequent increase in smoking, controlling for the baseline level of smoking, sex, ethnicity, and knowledge of warning labels on cigarette advertisements (odds ratio [OR], 1.22; 95% confidence interval [CI], 1.02-1.46). Knowledge of warning labels on cigarette advertisements was not associated with a significant change in smoking behavior (OR, 1.06; 95% CI, 0.82-1.35).

Conclusions
Sizable proportions of adolescent smokers are not seeing, reading, or remembering cigarette warning labels. In addition, knowledge of warning labels on cigarette packages and advertisements is not associated with reduced smoking. The current warning labels are ineffective among adolescents.

Arch Pediatr Adolesc Med. 1997;151:267-272



Author Affiliations



From the Departments of Pediatrics (Dr Robinson) and Medicine (Drs Robinson and Killen) and the Stanford Center for Research in Disease Prevention (Drs Robinson and Killen), Stanford University School of Medicine, Stanford, Calif.



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