The Impact of Dietary Quality and Physical Activity on the Elderly Obesity－An Application with the Endogenous Switching Regression Model

• Main Authors: Chen, LI-Jie, 陳俐潔
• Other Authors: Lee, Chieh-Hsien
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/ku2k87

碩士 === 佛光大學 === 經濟學系 === 97 === This study investigates the effects of dietary quality and exercise of Taiwanese elder on obesity with Nutrition and Health Survey in Taiwan, NAHSIT,1997~2002 of Taiwanese nutrition and health survey (1997~2002) which Department of Health authorize Institute of Biomedical Sciences, Academia Sinica to transact; The total taken sample quantity is 2049. The Endogenous Switching Regression Model is important to affect the Exogeneous Variable(exercise is endogenized in this study) of elder obesity. Exercise can affect elder obesity directly but also changed by dietary quality indirectly and affect elder obesity further. Hence, with Endogenous Switching Regression Model the study takes the exercise level of sample-observing as the deciding variable of regression model-transferring. The effects of dietary quality and sociodemographic variables on bodyweight and evaluations of the improvement of elder dietary quality for obesity effects through the concept of dietary elasticity are focused. Finally evaluate the result of obesity improvement. The differences between this study and other records related with dietary, exercise and obesity are as following: 1. Exercise is endogenized. In a short period, it’s hard to change dietary quality for elder but the exercise level also is another way to affect obesity level. 2. Try to use binary model to investigate the effect level of dietary quality for obesity under the different energy activities level. The study states that: 1. Due correlation coefficient are different sign so takes that if there is regular exercise or not with comparative advantage as economical meaning. The group with exercise hobby has lower Body Mass Index because of exercise; on the other hand, the group without exercise habit has lower Body Mass Index because of no exercise habit as well. 2. Use dietary elasticity to evaluate the improvement of elder obesity. The elder with exercise improve their own obesity by changing dietary quality. If elder with continued exercise increase Healthy Eating Index by 10% then the obesity can be improved by 0.69%; this result is a statistically significance. While the dietary elasticity of elder without continued exercise isn’t a statistically significance and the sign is positive. Hereby it may say that changing dietary quality won’t improve obesity situation due there’s not continued exercise. For elder, there must be enough physical activity to make healthy dietary quality lead to lower obesity level (ex. low BMI.) if there is no proper physical activity but only with good dietary quality then the obesity still doesn’t become low obviously; instead, it may increase their own BMI. This study believes that endogenized exercise values for scholars and strategy executives who care about obesity popular ration very much.