Consistency between bioelectrical impedance analysis and dual-energy X-ray absorptiometry in body composition measurement in children aged 6-17 years in China
10.3760/cma.j.cn112338-20240530-00316
- VernacularTitle:生物电阻抗法与双能X线吸收法测定中国6~17岁儿童体成分的一致性分析
- Author:
Ruihe LUO
1
;
Liping SHEN
;
Qian ZHANG
;
Wei CAO
;
Hongliang WANG
;
Peipei XU
;
Zhenyu YANG
;
Qian GAN
;
Xuehong PANG
;
Tao XU
;
Bowen CHEN
;
Yuying WANG
;
Wenhua ZHAO
Author Information
1. 中国疾病预防控制中心营养与健康所/国家卫生健康委公共营养与健康重点实验室/中国疾病预防控制中心母乳科学研究重点实验室，北京 100050
- Keywords:
Bioelectrical impedance analysis;
Dual-energy X-ray absorptiometry;
Body composition;
Fat mass;
Fat-free mass;
Fat mass percentage
- From:
Chinese Journal of Epidemiology
2024;45(11):1507-1512
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the consistency between bioelectrical impedance analysis (BIA) and dual-energy X-ray absorptiometry (DXA) in the measurement of body composition in children aged 6-17 years in China.Methods:Fat-free mass, fat mass and fat mass percentage were measured by both BIA and DXA in 1 161 children. t-test or Wilcoxon paired test was used to evaluate the different outcome of the two methods. The correlation and consistency between the methods were evaluated by Spearman correlation coefficients ( r) and Bland-Altman analysis. Results:Body compositions measured by BIA was positively correlated with those measured by DXA (fat mass r=0.95, fat-free mass r=0.98, fat mass percentage r=0.86, all P<0.05). Comparing with DXA, BIA underestimate children's fat mass [the mean difference is -3.15 kg, and the SD is 2.35 kg, 95% limits of agreement (LoA): -7.74-1.45 kg] and fat mass percentage (the mean difference is -8.45%, and the SD is 4.63%, 95% LoA: -17.53%-0.64%). Conclusions:Body compositions measured by BIA was highly positively correlated with those measured by DXA. BIA has certain application value in the measurement of body fat mass and fat-free mass of children aged 6-17 years.
