[Association of borderline glucose tolerance to dietary intakes and life style-cross sectional study of urban male workers examined at the annual health examination].
In this study, the association of borderline glucose tolerance to dietary intakes and life style was examined. Subjects were 2215 male workers aged 23 through 69, who visited a medical examination center in Tokyo between January 1987 through February 1989 for an annual health examination. Based on results of a 75 gram glucose tolerance test, subject were divided into three groups: 1. diabetes mellitus,2. borderline glucose tolerance, and 3.normal. Nearly one half of the subjects were found to have borderline glucose tolerance. Clinical results and ages of the borderline glucose tolerance group were between those of the normal and the diabetes mellitus groups. Differences between the borderline glucose tolerance group and the normal group with respect to dietary intake and life style were analyzed by a logistic model. Because associations were found to differ by obesity level (calculated by Katsura method) in the primary analysis, second stage analysis was performed with obesity level. For subjects who were less than 10% overweight, borderline glucose tolerance was more frequent with the following characteristics: age over 40; administrative or sales position; eating and drinking after 9:00 pm; consumption of more than three caps of coffee with sugar per day; having a sweet taste; eating rapidly; positive for Type A personality score. For the subjects who were more than 10% overweight, borderline glucose tolerance was more frequent with the following: age less than 40; consumption of more than three caps of coffee with sugar per day; preferring fatty foods; and positive for Type A personality score. These results indicate the importance of dietary education especially in workers who are less than 10% overweight.