卫生研究

目的测定北京市超重和肥胖成人基础代谢率(BMR),分析其与体成分的相关性,寻找适合我国超重肥胖人群基础代谢率的估算公式。方法采用间接测热法测定BMR,双能X线吸收法测定体成分,Pearson相关性分析检验BMR和体成分的关系,并将BMR实测值与常用公式估算值进行比较。结果 85名受试者基础代谢的能量消耗,超重组和肥胖组显著高于体重正常组(P<0.001),肥胖组显著高于超重组(P=0.036)。超重组和肥胖组受试对象的基础代谢率与瘦体重相关性最强(r=0.865;r=0.784)。BMI正常和肥胖组受试者的脂肪组织质量与BMR无显著相关性,超重受试者的脂肪组织质量与BMR呈显著负相关(r=-0.484)。HENRY公式和LIU公式的BMR估算值与实测值差异<2%,差异无统计学意义。结论超重肥胖人群的BMR要高于体重正常健康者。影响超重肥胖人群BMR的最主要因素是瘦体重,脂肪组织对BMR的影响尚不确定。HENRY公式和LIU公式适合我国超重肥胖人群。

Objective To detect the basal metabolic rate( BMR) of overweight and obese adults in Beijing,to investigate the correlation of BMR with body composition and to find a better BMR estimated equation for overweight and obese adults in China. Methods The BMR and body composition were detected with indirect calorimetry and dual-energy Xray absorptiometry. The correlations of BMR with body composition were used by Pearson correlation test. The measured BMR data were compared with the estimated values of commonly used equations. Results The study involved 85 adults. The BMR of overweight and obese adults were significantly more than those of normal BMI( P < 0. 001). The BMR of obese people were significantly more than overweight( P = 0. 036). The measured BMR was significantly correlated with lean body mass( r = 0. 865; r = 0. 784) in overweight and obese adults. The measured BMR was negatively correlated with fat mass in overweightpeople,but not among the normal BMI and obese people. The BMR average bias of HENRY equation and LIU equation were less than 2%, respectively, the difference was not significant( P > 0. 05). Conclusion The BMR of overweight and obese people is higher than normal healthy people. The important factor affect BMR is lean body mass. The impact of fat mass on BMR is uncertain. HENRY equation and LIU( ≥18) equation are suitable for predicting BMR of overweight and obese people.