Objective: To examine the correlation between dietary glycemic index (GI) and cardiovascular disease (CVD) risk factors among subjects who consume white rice as a staple food. Design: A cross-sectional study was conducted to explore the associations between dietary GI, dietary glycemic load (GL) and dietary intakes, and CVD risk factors. Dietary GI and GL were calculated from a 3-day (including two consecutive weekdays and one holiday) dietary records. Setting: A weight-reduction program at a municipal health center in Tokyo, Japan. Subjects: A total of 32 women aged 52.577.2 y participated in the weight-reduction program. Result: The GI food list made for the current study calculated for 91% of carbohydrate intakes measured. The mean dietary GI was 6476, and the mean dietary GL was 150737. Individuals in the highest tertile of GI consumed more carbohydrate, mostly from white rice (Po0.001), and less fat (Po0.01). Individuals in all three groups by tertile of GL showed similar tendencies. In the lowest GI tertile, the highest concentration of HDL-cholesterol and lowest concentration of triacylglycerol and immunoreactive insulin were observed (Po0.01). In the lowest GL tertile, the highest concentration of HDL-cholesterol and the lowest concentration of triacylglycerol were observed (Po0.05). Conclusion: Calculated dietary GI and GL were positively associated with CVD risk factors among the Japanese women who consumed white rice as a staple food.
OBJECTIVE:The purpose of the present study was to determine the effects of weight variability on cardiovascular risk factors (CRF) based on a large sample of community-resident Japanese males and females. METHOD: A total of 3564 men and 1955 women, all Japanese, aged 30±69 y in the baseline year (1987), were followed-up for up to 10 y (end-point in 1996). Height, body weight, systolic and diastolic blood pressure, fasting serum total cholesterol, triglyceride and fasting plasma glucose were measured as an annual health check-up. At least six times in 10 y, body mass index (BMI) mean was calculated as an index of the BMI level of each subject (BMI mean). Direction and magnitude of the change in a subject's BMI was determined by a regression slope of BMI values over time (BMI slope). BMI¯uctuation was de®ned as the root mean square error (BMI RMSE) of a regression line. The slopes of the ®ve CRF were calculated using each regression equation over time. RESULTS: The BMI slope strongly correlated to each CRF slope independent of baseline age, baseline CRF value, smoking habit, BMI mean and BMI RMSE. BMI RMSE did not correlate to any CRF slopes. CONCLUSION: This study indicates that weight gain and weight loss have a much greater effect on CRF change than does weight¯uctuation in Japanese middle-aged men and women.
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