(23-01-08) Legume and soy food intake and the incidence of type 2 diabetes in the Shanghai Women's Health Study1,2,3

Raquel Villegas, Yu-Tang Gao, Gong Yang, Hong-Lan Li, Tom A Elasy, Wei Zheng and Xiao Ou Shu
1 From the Department of Medicine, Vanderbilt Epidemiology Center and Vanderbilt Ingram?Cancer Center, Vanderbilt University Medical Center, Nashville, TN (RV, GY, WZ, and XOS); the Department of Epidemiology, Shanghai Cancer Institute, Shanghai, Peoples Republic of China (Y-TG and H-LL); the Department of Medicine, Vanderbilt Diabetes Research and Training Center, Vanderbilt University Medical Center, Nashville, TN (TAE)
Background: It has been postulated that a diet high in legumes may be beneficial for the prevention of type 2 diabetes mellitus (type 2 DM). However, data linking type 2 DM risk and legume intake are limited.
Objective: The objective of the study was to examine the association between legume and soy food consumption and self-reported type 2 DM.
Design: The study was conducted in a population-based prospective cohort of middle-aged Chinese women. We followed 64 227 women with no history of type 2 DM, cancer, or cardiovascular disease at study recruitment for an average of 4.6 y. Participants completed in-person interviews that collected information on diabetes risk factors, including dietary intake and physical activity in adulthood. Anthropometric measurements were taken. Dietary intake was assessed with a validated food-frequency questionnaire at the baseline survey and at the first follow-up survey administered 2?3 y after study recruitment.
Results: We observed an inverse association between quintiles of total legume intake and 3 mutually exclusive legume groups (peanuts, soybeans, and other legumes) and type 2 DM incidence. The multivariate-adjusted relative risk of type 2 DM for the upper quintile compared with the lower quintile was 0.62 (95% CI: 0.51, 0.74) for total legumes and 0.53 (95% CI: 0.45, 0.62) for soybeans. The association between soy products (other than soy milk) and soy protein consumption (protein derived from soy beans and their products) with type 2 DM was not significant.
Conclusions: Consumption of legumes, soybeans in particular, was inversely associated with the risk type 2 DM.

Source: AJCN

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