Wang Y, Ge K, Popkin B M
Department of Nutrition and the Carolina Population Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27516-3997, USA.
Am J Clin Nutr. 2000 Oct;72(4):1018-24. doi: 10.1093/ajcn/72.4.1018.
Although extensive descriptive research shows that childhood obesity predisposes a person to adult obesity, little is understood about the dynamics of weight during childhood and the predictors of weight tracking.
Our objective was to examine tracking patterns of body mass index (BMI) as well as their predictors between childhood and adolescence.
A cohort of 975 Chinese children aged 6-13 y was followed for 6 y (1991-1997). Tracking of BMI was defined as an individual maintaining a certain status (overweight or underweight) or relative position (relative BMI quartile) over time. Relative BMI related BMI to age- and sex-specific BMI cutoffs.
After 6 y, approximately 40% of the subjects had maintained their relative positions, but 30% had moved into a lower or higher quartile. The BMIs of thin and fat children were more likely to track: 51% and 46% remained in the bottom and upper quartiles, respectively. Nearly one-third of the underweight children remained underweight in 1997. Overweight children were 2.8 times as likely as all other children to become overweight adolescents; underweight children were 3.6 times as likely to remain underweight as adolescents. Parental obesity and underweight, individuals' initial BMIs, dietary fat intake, and family income helped predict tracking and changes in BMI.
In a society undergoing enormous changes in diet and activity, BMI tracking is still very important between childhood and adolescence in China.
尽管大量描述性研究表明儿童肥胖会使人易患成人肥胖症，但对于儿童期体重变化动态以及体重轨迹的预测因素，人们了解甚少。
我们的目的是研究儿童期至青春期体重指数（BMI）的轨迹模式及其预测因素。
对975名6至13岁的中国儿童进行了为期6年（1991 - 1997年）的队列研究。BMI轨迹被定义为个体随时间维持某种状态（超重或体重不足）或相对位置（相对BMI四分位数）。相对BMI将BMI与年龄和性别特异性BMI临界值相关联。
6年后，约40%的受试者维持了他们的相对位置，但30%的受试者进入了更低或更高的四分位数。瘦和胖儿童的BMI更有可能保持轨迹：分别有51%和46%的儿童仍处于最低和最高四分位数。近三分之一的体重不足儿童在1997年仍体重不足。超重儿童成为超重青少年的可能性是所有其他儿童的2.8倍；体重不足儿童在青少年期仍体重不足的可能性是其他儿童的3.6倍。父母肥胖和体重不足、个体的初始BMI、膳食脂肪摄入量和家庭收入有助于预测BMI的轨迹和变化。
在一个饮食和活动发生巨大变化的社会中，在中国儿童期至青春期BMI轨迹仍然非常重要。
