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Ten-year trends in cigarette smoking among young adults, 1986-1996: the CARDIA study. Coronary Artery Risk
L E Wagenknecht1, T E Craven, J S Preisser
1Department of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA. lwagenkn@rc.phs.bgsm.edu
Purpose:
To calculate ten-year smoking trends in a longitudinal cohort of young adults, and to characterize trends by race, sex, education, and birth cohort.
Methods:
Data on cigarette smoking have been collected for ten years (1986-1996) from 5115 black and white men and women, aged 18-30 years, participating in the Coronary Artery Risk Development In Young Adults (CARDIA) study. Regression analysis adjusting for intra-person correlation over time and weighting for factors affecting follow-up was used to estimate change in smoking rates.
Results:
Overall, smoking rates declined in white women (-0.50%/year, p < 0.001) and white men (-0.24%/year, p = 0.03). Rates remained stable in black women and increased in black men (0.37%/year, p = 0.01). Declining rates were generally observed in white women of all educational levels and birth cohorts and in several subgroups of white men. Increasing rates among black men could be attributed primarily to increasing rates in the youngest birth cohort. Among black men and women, prevalence of smoking in 1986 was considerably lower in the youngest birth cohort compared to the oldest; however, the increasing rates of change in smoking rates observed among the youngest birth cohorts (and decreasing rates in the oldest) lessened the disparity in prevalence rates across birth cohorts by 1996. Smoking initiation rates were highest among black men; cessation rates were highest among white women.
Conclusions:
These findings confirm that declines in smoking prevalence are not occurring across all groups, and reveal populations in special need of targeted interventions, particularly young black men.