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Published on: August 6, 2013
Cigarette smoking and Parkinson's disease: a meta-analysis
Chikako Kiyohara1, Shota Kusuhara
1Department of Preventive Medicine, Graduate School of Medical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan. chikako@phealth.med.kyushu-u.ac.jp
Fukuoka Igaku Zasshi = Hukuoka Acta Medica
|October 5, 2011
Summary
Smoking is linked to a reduced risk of developing Parkinson's disease (PD). This meta-analysis of 54 studies confirms that current and former smokers have a significantly lower likelihood of PD.
Area of Science:
- Neuroscience
- Epidemiology
- Public Health
Background:
- Numerous studies suggest an inverse relationship between smoking and Parkinson's disease (PD).
- However, the strength and consistency of this association require further investigation through comprehensive analysis.
Purpose of the Study:
- To conduct a meta-analysis of epidemiological studies to summarize the association between smoking and Parkinson's disease risk.
- To explore potential factors influencing this association, including study design, ethnicity, and control group selection.
Main Methods:
- A meta-analysis was performed on 54 epidemiological studies (48 case-control, 6 cohort).
- Risk estimates were calculated for current, former, and ever smokers.
- Stratified analyses were conducted based on study design, ethnicity, and source of controls.
Main Results:
- Smokers (current, former, and ever) showed a significantly lower risk of Parkinson's disease.
- Summary risk estimates indicated reduced odds for current smokers (0.31), former smokers (0.72), and ever smokers (0.55).
- Stratified analyses revealed variations in the association based on study design and control group source, though not always statistically significant.
Conclusions:
- This meta-analysis confirms that smoking is associated with a reduced risk of Parkinson's disease.
- Further research into smoking-gene interactions may elucidate the pathogenesis of PD.
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