论文部分内容阅读
目的比较7～15岁肥胖儿童双能X线吸收法(DEXA)与生物电阻抗法(BIA)身体成分测量结果及其与正常儿童的比较,为BIA在肥胖儿童体重控制中的应用提供基础数据。方法选择7～15岁体重正常和肥胖儿童共356名,每组各性别、年龄约10名,分别采用DEXA和BIA测定身体脂肪组织和非脂肪组织成分及骨矿含量,分析肥胖儿童2种方法测量结果的相关性和一致性以及与正常儿童的差异。结果7～15岁男、女肥胖儿童肌肉组织、骨矿含量、脂肪组织和脂肪百分比BIA与DEXA测量结果的相关系数除11～15岁女生骨矿含量外,差异均有统计学意义(P值均<0.05),脂肪组织相关系数高于其他指标。7～15岁肥胖儿童BIA与DEXA脂肪百分比测量结果的差值均值有随年龄增长而降低的趋势。男生BIA与DEXA脂肪百分比测量值比较的一致性限为-7.5%～8.6%,女生为-7.5%～11.0%。低年龄(<13岁)高脂肪百分比组(≥35%)和高年龄(≥13岁)低脂肪百分比组(<35%)肥胖男、女生脂肪组织指数(FMI)和非脂肪组织指数(FFMI)差值均值较小。结论肥胖儿童BIA与DEXA身体成分测量值的相关性以及一致性与体重正常儿童相比时,结果更好。
OBJECTIVE: To compare body composition measurement between DEXA and bioelectrical impedance spectroscopy (BIA) in obese children aged 7-15 and their comparison with normal children, and to provide basic data for the application of BIA in weight control of obese children . Methods A total of 356 children with normal weight and obesity aged 7-15 years were enrolled. Each group was divided into three groups according to sex and age. DEXA and BIA were used to determine body fat and non-fat tissue components and bone mineral content. Relevance and consistency of measurement results and differences with normal children. Results The correlation coefficients of BIA and DEXA in muscle and bone mineral content, bone mineral content, adipose tissue and fat percentage in 7-15-year-old obese children were significantly different from those in 11-15-year-old girls (P value All <0.05), and the correlation coefficient of adipose tissue was higher than other indexes. The mean value of the difference between BIA and DEXA fat percentage in obese children aged 7-15 years tends to decrease with age. The BMI and DEXA percentages of fat in boys were consistently -7.5% -8.6% and -7.5% -11.0% for girls. Fat male and female obese men and women had significantly lower levels of fat tissue index (FMI) and non-fat tissue index (FFMI) than those with low fat percentage (≥35%) and high fat percentage (≥13 years) The mean difference is smaller. Conclusions The association and consistency of body composition measurements between obese children with DEXA and BIA are better than those of normal-weight children.