背景和目的:随着社会的进展,久坐和高热量饮食行为越来越多见,从而导致体重的不断增长。本研究的目的是分析加拿大儿童1981至1996年间体重指数的长期变化。方法:使用具有全国代表性的3次调查数据进行分析,包括1981年加拿大体质调查(Canadafitnesssurvey)、1988年坎贝尔健康状况 Background and Objective: As the society progresses, sedentary and high-calorie diet behaviors are increasingly seen, resulting in a continuous increase in body weight. The purpose of this study was to analyze the long-term changes in the body mass index of Canadian children between 1981 and 1996. METHODS: The data were analyzed using three nationally representative surveys, including the Canadafitness survey of 1981, the health status of Campbell in 1988,