Journal of Epidemiology
Online ISSN : 1349-9092
Print ISSN : 0917-5040
ISSN-L : 0917-5040
Association between Okinawan vegetables consumption and risk of type 2 diabetes in Japanese communities: The JPHC Study
Junpei YamamotoJunko IshiharaAyaka KotemoriTakahiro YoshizakiAtsushi GotoTetsuya MizoueMitsuhiko NodaNorie SawadaShoichiro Tsugane
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JOURNALS OPEN ACCESS Advance online publication

Article ID: JE20180262

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Abstract

Background: Some Okinawan vegetables have been reported to have anti-diabetic activity; however, no prospective cohort study has clarified whether Okinawan vegetables are associated with a risk of type 2 diabetes. This study aimed to determine the association between consumption of Okinawan vegetables and risk of type 2 diabetes through a large-scale, population-based, prospective study in Japan.

Methods: We examined 10,732 participants (4,714 men and 6,018 women) aged 45-74 years who resided in Okinawa. Participants were asked to answer a 147-item food frequency questionnaire. We calculated the overall amount of Okinawan vegetables consumed and the amount of 7 specific kinds of Okinawan vegetables consumed. The odds ratios (ORs) for self-reported type 2 diabetes during 5 years of follow-up were estimated via multivariate logistic regression analysis.

Results: During the 5-year period, 216 new cases (123 men and 93 women) of type 2 diabetes were reported. Comparing the highest tertile to the lowest tertile of intake, the overall amount of Okinawan vegetables consumed was not associated with risk of type 2 diabetes in men (OR=1.22, 95% confidence interval [CI]=0.74-2.01, p-trend=0.53) or in women (OR=0.96, 95% CI=0.57-1.62, p-trend=0.89). The consumption of 7 specific kinds of Okinawan vegetables was also not associated with the risk of type 2 diabetes.

Conclusions: The consumption of total Okinawan vegetables was not associated with the risk of type 2 diabetes.

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© 2019 Junpei Yamamoto et al. This is an open access article distributed under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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