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  • Title: Dietary supplementation by Japanese patients with chronic obstructive pulmonary disease.
    Author: Hirayama F, Lee AH, Binns CW, Taniguchi H.
    Journal: Complement Ther Med; 2009 Jan; 17(1):37-43. PubMed ID: 19114227.
    Abstract:
    OBJECTIVES: To investigate the prevalence and type of dietary supplements taken by Japanese patients with chronic obstructive pulmonary disease (COPD) and factors affecting their use. DESIGN: Cross-sectional study by face-to-face interviews. SETTING: Six hospitals in central Japan. PARTICIPANTS: Of the 300 referred COPD patients aged between 50 and 75 years, 278 eligible participants (244 men and 34 women) with complete data were available for analysis. MAIN OUTCOME MEASURES: Prevalence of supplement use, dietary supplement categories (multivitamin, beta-carotene, vitamin C, vitamin E, and miscellaneous). RESULTS: Overall, 42% of participants were dietary supplement users taking at least one category of supplements weekly; the prevalence being higher for female (47%) than male patients (41%). The most common supplements consumed were energy drink for men (11.1%), and multivitamin (11.8%) and vinegar (11.8%) for women. Dietary supplementation was found to be affected by age (p=0.04), COPD severity (p=0.03) and presence of co-morbidity (p=0.03). Older patients over 60 years were more likely to take dietary supplements (odds ratio (OR) 2.44, 95% CI 1.03-5.80), whereas severe COPD patients (OR 0.41, 95% CI 0.18-0.95) and those with a co-morbidity (OR 0.54, 95% CI 0.32-0.94) tended not to use. CONCLUSIONS: Dietary supplements are popular for patients with COPD especially among older patients. The findings are important to clinical trials and experimental interventions advocating nutritional supplementation therapy for pulmonary rehabilitation.
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