Smoking duration, intensity, and risk of Parkinson disease

H. Chen, X. Huang, X. Guo, R. B. Mailman, Y. Park, F. Kamel, D. M. Umbach, Q. Xu, A. Hollenbeck, A. Schatzkin, A. Blair

Research output: Contribution to journalArticle

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Abstract

Objective: To evaluate the relative importance of smoking duration vs intensity in reducing the risk of Parkinson disease (PD). Methods: The study included 305,468 participants of the NIH-AARP Diet and Health cohort, of whom 1,662 had a PD diagnosis after 1995. We estimated odds ratios (OR) and 95% confidence intervals from multivariate logistic regression models. Results: Compared with never smokers, the multivariate ORs were 0.78 for past smokers and 0.56 for current smokers. Among past smokers, a monotonic trend toward lower PD risk was observed for all indicators of more smoking. Stratified analyses indicated that smoking duration was associated with lower PD risk within fixed intensities of smoking. For example, compared with never smokers, the ORs among past smokers who smoked > 20 cigarettes/day were 0.96 for 1-9 years of smoking, 0.78 for 10-19 years, 0.64 for 20-29 years, and 0.59 for 30 years or more (p for trend = 0.001). In contrast, at fixed duration, the typical number of cigarettes smoked per day in general was not related to PD risk. Close examination of smoking behaviors in early life showed that patients with PD were less likely to be smokers at each age period, but if they smoked, they smoked similar numbers of cigarettes per day as individuals without PD. Conclusions: This large study suggests that long-term smoking is more important than smoking intensity in the smoking-Parkinson disease relationship.

Original languageEnglish (US)
Pages (from-to)878-884
Number of pages7
JournalNeurology
Volume74
Issue number11
DOIs
StatePublished - Mar 16 2010

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Parkinson Disease
Smoking
Tobacco Products
Logistic Models
Odds Ratio
Confidence Intervals
Diet
Health

All Science Journal Classification (ASJC) codes

  • Clinical Neurology

Cite this

Chen, H. ; Huang, X. ; Guo, X. ; Mailman, R. B. ; Park, Y. ; Kamel, F. ; Umbach, D. M. ; Xu, Q. ; Hollenbeck, A. ; Schatzkin, A. ; Blair, A. / Smoking duration, intensity, and risk of Parkinson disease. In: Neurology. 2010 ; Vol. 74, No. 11. pp. 878-884.
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Chen, H, Huang, X, Guo, X, Mailman, RB, Park, Y, Kamel, F, Umbach, DM, Xu, Q, Hollenbeck, A, Schatzkin, A & Blair, A 2010, 'Smoking duration, intensity, and risk of Parkinson disease', Neurology, vol. 74, no. 11, pp. 878-884. https://doi.org/10.1212/WNL.0b013e3181d55f38

Smoking duration, intensity, and risk of Parkinson disease. / Chen, H.; Huang, X.; Guo, X.; Mailman, R. B.; Park, Y.; Kamel, F.; Umbach, D. M.; Xu, Q.; Hollenbeck, A.; Schatzkin, A.; Blair, A.

In: Neurology, Vol. 74, No. 11, 16.03.2010, p. 878-884.

Research output: Contribution to journalArticle

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AU - Huang, X.

AU - Guo, X.

AU - Mailman, R. B.

AU - Park, Y.

AU - Kamel, F.

AU - Umbach, D. M.

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AU - Schatzkin, A.

AU - Blair, A.

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N2 - Objective: To evaluate the relative importance of smoking duration vs intensity in reducing the risk of Parkinson disease (PD). Methods: The study included 305,468 participants of the NIH-AARP Diet and Health cohort, of whom 1,662 had a PD diagnosis after 1995. We estimated odds ratios (OR) and 95% confidence intervals from multivariate logistic regression models. Results: Compared with never smokers, the multivariate ORs were 0.78 for past smokers and 0.56 for current smokers. Among past smokers, a monotonic trend toward lower PD risk was observed for all indicators of more smoking. Stratified analyses indicated that smoking duration was associated with lower PD risk within fixed intensities of smoking. For example, compared with never smokers, the ORs among past smokers who smoked > 20 cigarettes/day were 0.96 for 1-9 years of smoking, 0.78 for 10-19 years, 0.64 for 20-29 years, and 0.59 for 30 years or more (p for trend = 0.001). In contrast, at fixed duration, the typical number of cigarettes smoked per day in general was not related to PD risk. Close examination of smoking behaviors in early life showed that patients with PD were less likely to be smokers at each age period, but if they smoked, they smoked similar numbers of cigarettes per day as individuals without PD. Conclusions: This large study suggests that long-term smoking is more important than smoking intensity in the smoking-Parkinson disease relationship.

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