目的 应用体成分探索儿童体脂状况以及利用脂肪质量指数(FMI)、体脂含量百分比(PBF)探索儿童肥胖的诊断切点。方法 采用横断面研究,应用生物电阻抗技术测量2017年1月—2022年8月期间在苏州大学附属儿童医院儿童保健部门诊就诊的22 198名儿童体成分。记录参与者的体质量指数(BMI)、脂肪量(FM)、去脂体重(FFM)、FMI和PBF等指标。结果 男、女童3~5岁的BMI、PBF和FMI呈下降趋势,5岁以后的BMI、PBF和FMI呈不断增长趋势,而男童的PBF和FMI在10岁以后呈下降或平缓趋势。ROC曲线分析显示,性别、年龄别FMI和PBF诊断肥胖的AUC均大于0.900,特异度和灵敏度基本>90%。结论 FMI和PBF作为临床预测肥胖指标的诊断价值较高。应用FMI或PBF可直观准确地反映儿童体脂含量和变化。
Abstract
Objective To explore the body fat status in children using body composition, and to explore the cut-off values of fat mass index (FMI) and body fat percentage (PBF) for the diagnosis of obesity in children. Methods A cross-sectional design was adopted. From January 2017 to August 2022, body composition of 22 198 children who visited the outpatient department of Child Health Care of Children′s Hospital of Soochow University was measured by bioelectrical impedance analysis. Body mass index (BMI), fat mass (FM), fat-free mass (FFM),FMI and PBF of children were recorded. Results BMI, PBF and FMI of boys and girls showed a downward trend from 3 to 5 years old, and showed an increasing trend after 5 years old, while PBF and FMI of boys showed a downward or flat trend after 10 years old. ROC curve analysis showed that the AUC of FMI and PBF of sex and age in the diagnosis of obesity was greater than 0.900, and the specificity and sensitivity were basically greater than 90%. Conclusions FMI and PBF have high diagnostic value as clinical indicators for predicting obesity. The application of FMI or PBF can intuitively and accurately reflect the content and changes of body fat in children.
关键词
肥胖 /
体成分 /
脂肪质量指数 /
体脂含量百分比 /
儿童
Key words
obesity /
body composition /
fat mass index /
percent body fat /
children
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