여자중학생의 신체조성과 비만에 관한 연구

Abstract

To study of the body composition and obesity of the Korean girl`s middle school, we first select 10 schools for simple random sample from the girls`s middle school in urban area. For the second stage, we select total 815 sample students for the study, age range from 13 to 15, from the sampled schools. We measured the followings : First, we measure physical index(height, weight, chest girth, sit height), BMI and RBW. Second, we measure the value of body composition by anthropometric method and BI method. Third, we investigate the relationships among the obesity by %Fat, standard weight, and BMI. Last, we study the correlation between body composition which are measured by BI method and physiques 1. Physiques and Physique index 1) Sample mean of height is 159.36±4.66cm, and sample mean of weight is 53.41kg±7.53cm. Sample means of height and weight are both increasing according to the grade. Population means for the height and weight are both statistically significant among grades(p.001) 2) Sample mean of RBW is 32.65±4.55, and sample mean of BMI is 21.01±2.63. For RBW, the population means are different by grades(p,001), and the third grade in girl`s middle school has the highest mean(p.001). For BMI, there is no evidence the means are different by grades. 2. Percentage body fat by the Anthropometric method and BI method 1) Total average of the girl`s middle school is 28.82%±3.20% by the anthoropometric method, and the first grade has the highest mean. But there is no statistical difference in average by grades. 2) Total average of the girl`s middle school is 29.05±4.74% by the BI method, The values by BI method are very similar to the result of the values by the anthoropometric method. The third grade has the highest average. But there is no statistical difference in average by grades. 3. Fat Weight(kg) by the Anthropometric method and BI method 1) Total average of the girl`s middle school is 14.79.37±1.98kg by the anthoropometric method, There is no statistical difference between the first grade and the second grade. But these two groups(the first grade and the second grade) are different from the third grade(p.001). 2) Total average of the girl`s middle school is 15.22±4.19kg by the BI method. The third grade has the highest average(15.77±3.94kg), and it has statistical difference in average to the first grade and the second grade(p.001), 4. FFW(kg, Fat Free Weight) by the Anthropometric method and BI method 1) Total average of the girl`s middle school is 36.97±6.50kg by the anthoropometric method. The third grade has the highest average(36.97±6.50kg), and it has statistical difference in average to the first grade and the second grade(p.001), 2) Total average of the girl`s middle school is 36.54kg±4.24 by the BI method. The third grade has the highest average amount(37.64±4.74kg), and the first grade has the lowest grade. The third grade has difference in average with the first grade and the second grade(p.001). There is no difference between the first grade and the second grade. 5. The comparison of the body composition by the he Anthropometric method and BI method The average by grades are not statistically different when we measure %Fat and FFW by the above two methods, but it is different for FW(p.05). 6. The comparison of the obesity rate based on the standard weight, BMI, and % Fat(BI method) 16.93% of the girl`s middle school are obesity by the standard weight method, and 6.99% are obesity by the BMI method, and the 40.00% are obesity by % Fat(the BI method). 7. Correlation between % Fat(BI method) and physiques 1) Correlation between % Fat and physiques The correlation coefficient between %Fat and weight is r=+0.5054(p.0001), and the correlation of coefficient between %Fat and chest girth is r=+0.5729(p.0001). Both are positive correlation and significant(p.0001). But there are no correlation between %Fat and height, between %Fat and sitting height, respectively. 2) Correla