© 2004 by Oxford University Press
© 2004 Oxford University Press
ARTICLE |
Association Between Exclusive Pipe Smoking and Mortality From Cancer and Other Diseases
Affiliation of authors: Epidemiology and Surveillance Research, American Cancer Society, Atlanta, GA
Correspondence to: Jane Henley, MSPH, Epidemiology and Surveillance Research, American Cancer Society, 1599 Clifton Rd., NE, Atlanta, GA 30329 (e-mail: jane.henley{at}cancer.org)
Background: Although many studies have examined the adverse health effects of pipe smoking combined with other forms of tobacco use, few have included large numbers of exclusive pipe smokers. The prevalence of pipe smoking has declined since the 1960s, yet usage is still common regionally, especially among older populations. Methods: Using Cox proportional hazards models, we examined the association between pipe smoking and mortality from tobacco-related cancers and other diseases in a cohort of U.S. men enrolled in the Cancer Prevention Study II, an American Cancer Society prospective study. The cohort of 138 307 men included those who reported, in their 1982 enrollment questionnaire, exclusive current or former use of pipes (n = 15 263 men) or never use of any tobacco product (n = 123 044 men). Analyses were based on 23 589 men who died during 18 years of follow-up. Results: Current pipe smoking, compared with never use of tobacco, was associated with an increased risk of death from cancers of the lung (relative risk [RR] = 5.00, 95% confidence interval [CI] = 4.16 to 6.01), oropharynx (RR = 3.90, 95% CI = 2.15 to 7.08), esophagus (RR = 2.44, 95% CI = 1.51 to 3.95), colorectum (RR = 1.41, 95% CI = 1.15 to 1.73), pancreas (RR = 1.61, 95% CI = 1.24 to 2.09), and larynx (RR = 13.1, 95% CI = 5.2 to 33.1), and from coronary heart disease (RR = 1.30, 95% CI = 1.18 to 1.43), cerebrovascular disease (RR = 1.27, 95% CI = 1.09 to 1.48), and chronic obstructive pulmonary disease (RR = 2.98, 95% CI = 2.17 to 4.11). These risks were generally smaller than those associated with cigarette smoking and similar to or larger than those associated with cigar smoking. Relative risks of lung cancer showed statistically significant increases with number of pipes smoked per day, years of smoking, and depth of inhalation and decreases with years since quitting. Conclusion: Results from this large prospective study suggest that pipe smoking confers a risk of tobacco-associated disease similar to cigar smoking.
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