Wang Zhenghe, Fu Lianguo, Yang Yide, Wang Shuo, Ma Jun
Wei Sheng Yan Jiu. 2016 May;45(3):362-6.
To compare consistency of Body Mineral Content (BMC, kg) assessed by Multi-frequency Bioelectrical Impedance Analysis ( MF-BIA) and Dual Energy X-ray Absorptiometry (DXA) measurement, providing evidence for MF-BIA accurate application in Chinese overweight/obese adults.
A total of 1323 overweight/obesity adults aged 22-55 years were recruited voluntarily. All the subjects received the measurement of BMC both using MF-BIA and DXA. To evaluate the agreement of BMC measured by MF-BIA and DXA using interclass correlation coefficients (ICC), then establish correction prediction models.
The mean difference of BMC between two methods was significant different with 0, overweight male subgroup was 0.28 kg, and 0.38 kg for obesity male, 0.24 kg for overweight female and 0.36 kg for obesity female, respectively (P < 0.05). The ICC of BMC between MF-BIA and DXA measurement were statistically significant in all subgroups (P < 0.01). The ICC for overweight male subgroup was 0.787, 0.796 for obesity male, 0.741 for overweight female and 0.788 for obesity female, respectively. Correction prediction model: overweight male population: BMC (DXA method) = -0.297 + 1.005 x BMC (MF-BIA method). Obese male population: BMC (DXA method) =0.302 + 0.799 x BMC (MF-BIA method). Overweight female groups: BMC (DXA method) = 0.780 + 0.598 x BMC (MF-BIA method). Obese female group: BMC (DXA method) = 0.755 + 0.597 x BMC (MF-BIA method). Upon examination, correction prediction models were better. Co
The correlation and agreement of BMC measured by BIA and DXA are weak in Chinese overweight/obese adults. Therefore, consideration should be given to BMC measured by BIA method in Chinese overweight/obese adults. It should be corrected or adjusted to reduce errors compared with DXA method.
比较多频生物电阻抗分析（MF-BIA）和双能X线吸收法（DXA）测量身体矿物质含量（BMC，kg）的一致性，为MF-BIA在中国超重/肥胖成年人中的准确应用提供依据。
自愿招募1323名年龄在22-55岁的超重/肥胖成年人。所有受试者均接受了MF-BIA和DXA两种方法的BMC测量。采用组内相关系数（ICC）评估MF-BIA和DXA测量的BMC的一致性，然后建立校正预测模型。
两种方法的BMC平均差异显著不为0，超重男性亚组为0.28kg，肥胖男性为0.38kg，超重女性为0.24kg，肥胖女性为0.36kg（P<0.05）。MF-BIA和DXA测量的BMC的ICC在所有亚组中均具有统计学意义（P<0.01）。超重男性亚组的ICC分别为0.787，肥胖男性为0.796，超重女性为0.741，肥胖女性为0.788。校正预测模型：超重男性人群：BMC（DXA法）=-0.297+1.005×BMC（MF-BIA法）。肥胖男性人群：BMC（DXA法）=0.302+0.799×BMC（MF-BIA法）。超重女性组：BMC（DXA法）=0.780+0.598×BMC（MF-BIA法）。肥胖女性组：BMC（DXA法）=0.755+0.597×BMC（MF-BIA法）。经检验，校正预测模型较好。
在中国超重/肥胖成年人中，BIA和DXA测量的BMC的相关性和一致性较弱。因此，对于中国超重/肥胖成年人，应考虑BIA法测量的BMC。与DXA法相比，应进行校正或调整以减少误差。
