Dietary glycemic index is inversely associated with the risk of Parkinson's disease: A case-control study in Japan

Kentaro Murakami, Yoshihiro Miyake, Satoshi Sasaki, Keiko Tanaka, Wakaba Fukushima, Chikako Kiyohara, Yoshio Tsuboi, Tatsuo Yamada, Tomoko Oeda, Takami Miki, Nobutoshi Kawamura, Nobutaka Sakae, Hidenao Fukuyama, Yoshio Hirota, Masaki Nagai

研究成果: Contribution to journalArticle査読

43 被引用数 (Scopus)


Objective: High glycemic index (GI) or glycemic load (GL) carbohydrates might be expected to decrease the risk of Parkinson's disease (PD) by an insulin-induced increase in brain dopamine. We conducted a hospital-based case-control study in Japan to examine associations between dietary GI and GL and other dietary carbohydrate variables, including intake of available carbohydrate and dietary fiber, and PD. Methods: Patients with PD diagnosed using the U.K. Parkinson's Disease Society Brain Bank criteria (n=249) and controls without neurodegenerative diseases (n=368) were recruited. Dietary intake during the preceding month was assessed at the time of study recruitment using a validated, self-administered, semiquantitative, comprehensive diet history questionnaire. Results: After adjustment for potential dietary and non-dietary confounding factors, dietary GI was significantly inversely associated with the risk of PD. Multivariate odds ratios (95% confidence intervals) for PD in the first, second, third, and fourth quartiles of dietary GI were 1.00 (reference), 1.03 (0.64-1.66), 0.68 (0.41-1.15), and 0.61 (0.34-1.09), respectively (P for trend=0.04). Conversely, no significant association was observed for other dietary carbohydrates, including dietary GL (P for trend=0.77), available carbohydrate intake (P for trend=0.28), or dietary fiber intake (P for trend=0.73). Conclusion: This preliminary case-control study based on current dietary habits found an independent inverse relation between dietary GI and PD. Considering the plausibility of the putative mechanism, further investigation using a case-control design with accurate assessment of past dietary habits or a prospective design is warranted.

出版ステータス出版済み - 5 2010

All Science Journal Classification (ASJC) codes

  • 内分泌学、糖尿病および代謝内科学
  • 栄養および糖尿病


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