JACN Did you know that you can get alerts when a new issue is online?
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Barranco Quintana, J. L.
Right arrow Articles by Navajas, R. F.-C.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Barranco Quintana, J. L.
Right arrow Articles by Navajas, R. F.-C.
Journal of the American College of Nutrition, Vol. 28, No. 1, 1-6 (2009)
Published by the American College of Nutrition

REVIEW

Parkinson's Disease and Tea: A Quantitative Review

José Luis Barranco Quintana, MD, MPH, Mohamed Farouk Allam, MPH, PhD, Amparo Serrano Del Castillo, MD, PhD and Rafael Fernández-Crehuet Navajas, MD, PhD

Department of Preventive Medicine and Public Health, Faculty of Medicine, University of Cordoba, Cordoba, SPAIN

Address reprint requests to: Mohamed Farouk Allam, Department of Preventive Medicine and Public Health, Faculty of Medicine, University of Cordoba, Avda. Menéndez Pidal, s/n Cordoba 14004, SPAIN. E-mail: fm2faahm{at}uco.es

Purpose: To evaluate the risk of PD associated with tea consumption.

Material and Methods: We reviewed all observational studies that evaluated the association between PD risk and tea consumption. Only, 12 studies were identified: 11 case-control and 1 cohort. These studies were carried out between 1981 and 2003. The studies represented different populations from 3 continents; North America, Europe and Asia. The 3 studies from Asia were case-control studies of Chinese populations.

Results: There was a clear protective effect of tea consumption in the pooled risk estimate [OR: 0.83 (95% confidence interval 0.74 to 0.92)] with 2215 cases and 145578 controls. However, the homogeneity test was significant (p value of 0.008), denoting heterogeneity across the pooled studies. Pooled analysis applying the random effect model was OR: 0.81 with 95% confidence interval nearly overlapping unity (95% confidence interval 0.67 to 0.98). Tea consumers versus non-consumers in Chinese populations had pooled OR of 0.73 with 95% confidence interval 0.60 to 0.90 (470 cases and 623 controls). The p value of homogeneity test was 0.96, denoting homogeneity across the pooled 3 studies.

Conclusion: Tea consumption can protect against PD and this protective effect is clearer in Chinese populations. The low rate of tea consumption among persons with PD should provide us many valuable insights into the nature of the illness.

Key words: Parkinson's disease, tea, systematic review, meta-analysis






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by the American College of Nutrition.