Abstract
BackgroundSome Okinawan vegetables have been reported to have anti-diabetic activity; however, no prospective cohort study has clarified whether consumption of Okinawan vegetables is 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.MethodsWe 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 seven 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.ResultsDuring 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 seven specific kinds of Okinawan vegetables was also not associated with the risk of type 2 diabetes.ConclusionsThe consumption of total Okinawan vegetables was not associated with the risk of type 2 diabetes.
Highlights
Diabetes mellitus is a serious health condition that is becoming an increasingly important public health concern worldwide
While meta-analyses of prospective studies showed no association between vegetable and fruit intake and the risk of type 2 diabetes,[5,6,7] green leafy vegetables reduced the risk of type 2 diabetes.[6,7]
Study population The JPHC Study contained two cohorts based on the public health center (PHC) area
Summary
Diabetes mellitus is a serious health condition that is becoming an increasingly important public health concern worldwide. In the Japanese population, approximately 20 million people were estimated as the sum of those strongly suspected and those with possibilities of having diabetes in 2016.1 The progression of diabetes can lead to complications, such as retinopathy, nephropathy, and neuropathy. These complications markedly lower the patient’s quality of life, and incur high healthcare costs.[2] preventing type 2 diabetes is clearly an important public health priority. 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
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