Evaluation of the Factorial Method for Determination of Energy Expenditure in 16 Young Adult Women Living in China

• Published in: Biomedical and environmental sciences 2011-08, Vol.24 (4), p.357-363
• Main Authors: LIU, JianMin, PIAO, JianHua, SUN, Rui, TIAN, Ying, YANG, XiaoGuang
• Format: Article
• Language: English
• Subjects: Adult; China; Chinese adults; Doubly labeled water; Energy expenditure; Energy Metabolism - physiology; Factorial method; Female; Humans; Motor Activity - physiology; Radioisotope Dilution Technique; Young Adult; 中国; 女性; 成年; 测定方法; 生活; 能量消耗; 评价; 阶乘
• ISSN: 0895-3988; 2214-0190
• DOI: 10.3967/0895-3988.2011.04.006

Objective The present study aimed to evaluate the accuracy of the factorial method for estimating energy needs in individuals living in China.Methods Sixteen healthy female adults aged 22.1±1.2 years with a body mass index （kg/m 2） of 20.4±1.7 were selected as subjects.In free-living conditions,energy expenditure （EE） was determined by using the factorial method.At the same time,the doubly labeled water method （DLW） was also used to measure energy expenditure of the subjects and served as the criterion method.EE predicted by the factorial method （EE factorial） was compared with the simultaneous measurement of EE by the validated DLW method （EE DLW）.Results There was excellent agreement between EE factorial （7.46±0.59 MJ/d） and EE DLW （7.64 ± 0.49 MJ/d）,with a difference of-2.6±4.9% （-0.18±0.36 MJ/d）.No significant differences were found between the two methods.EE factorial was highly correlated with EE DLW （r=0.795,P0.001） and a good agreement for individuals was found by using the Bland and Altman test.Conclusion The factorial method gives satisfactory estimates of EE for both groups and individuals living in China.