Effect of Dietary Pattern on Grip Strength in Middle Aged and Elderly People in Zhang Fang Village in Beijing

摘要

Objective To investigate the effect of the dietary pattern on the grip 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. We investigated the villagers about the diet intake, and the life habit, measured the parameters of anthropometry and their grip strength. According to the grip strength, the subjects were divided into grip reaching the standards group(GRS group) and grip not reaching the standards group(GNRS group). According to the median of proportion of protein intake, the subjects were divided into low proportion of protein intake group(LPPI group) and high proportion of protein intake group(HPPI group). We analyzed the differences between these groups, then used Logistic regression to analyze the indexes which can influence the grip strength. Results The grip strength of both hands reached the standards in 20 males (44.4%), in 55 females(61.8%). There were 75 cases in GRS group, 59 in GNRS group. There was significant difference in age, free fat mass (FFM), waist-hip ratio(WHR), arm muscle circumference (AMC), exercise conditions, intakes of carbohydrates, the intake of protein and fat between two groups. By logistic regression analysis, female, the high AMC and FFM, and high proportion of protein intake were protective factors of grip strength. In HPPI group, the intake of egg, beans, meat, fish, nut and total energy were significantly higher than the LPPI group. Conclusion In Zhang Fang Village, the dietary pattern is unbalanced. The low protein intake effects their grip strength. The low grip strength is associated with the low protein food, such as egg, bean, meat, fish, nut and low total energy.