Abstract: Objective To investigate the relationship between the fat intake and the morbidity of hyperglycemia in middle aged and elderly people in Zhang Fang village, Fang Shan District, Beijing. Methods Totally 134 middle aged and elderly villagers were selected randomly. The diet intake was investigated. Then we calculated the nutrients intake, average mixed dietary glycemic index and mixed dietary glycemic load. We measured the parameters of anthropometry, including body mass index, body fat, waist-hip rate and triceps skin fold, and daily life habit, such as smoking, drinking, sleeping and exercise. The immediate glucose was measured using Roche glucometer, and give clear indication of the measure time, such as fasting blood-glucose, 1-hour glucose or 2-hour glucose. Results of glucose testing were categorized as follow: hyperglycemia including fasting glucose level more than 6.1 mmol/L, 1-hour glucose level more than 11.1 mmol/L, 2-hour glucose level more than 7.8 mmol/L and diagnosed diabetes. The other people's levels were as in normal glucose. According to the median of fat intake, we separate the villagers into two groups, relatively high fat(RHF) group(fat intake more than 33.8g per day), relatively low fat(RLF) group(fat intake less than 33.8g per day). Then we analyzed the indexes of the two groups. Results The morbidity of hyperglycemia in this village in aged and elderly people was 47.01%(the morbidity of new discovery hyperglycemia was 29.1%). The morbidity of hyperglycemia in RHF group was higher than in RLF group significantly. There were no significant differences in carbohydrate intake, mixed dietary glycemic index, the parameters of anthropometry, and daily life habit between the two groups. But the intake of protein, dietary fiber, total energy and mixed dietary glycemic load in RHF group were significantly higher than those in RLF group. Conclusion The morbidity of hyperglycemia of middle aged and elderly people in Zhang Fang Village was in high level.This phenomenon is related to the high fat intake(but not carbohydrate intake) and high total energy intake, and has nothing to do with the parameters of anthropometry, and daily life habit.

Key words: hyperglycemia, fat intake, middle aged and elderly people