Hand-to-Hand Model for Bioelectrical Impedance Analysis to Estimate Fat Free Mass in a Healthy Population

• Published in: Nutrients 2016-10, Vol.8 (10), p.654
• Main Authors: Lu, Hsueh-Kuan, Chiang, Li-Ming, Chen, Yu-Yawn, Chuang, Chih-Lin, Chen, Kuen-Tsann, Dwyer, Gregory B, Hsu, Ying-Lin, Chen, Chun-Hao, Hsieh, Kuen-Chang
• Format: Article
• Language: English
• Subjects: Accuracy; Adolescent; Adult; Aged; Aged, 80 and over; anthropometrics; Anthropometry - methods; Asian Continental Ancestry Group; Body composition; Body Composition - physiology; Body Fluid Compartments - metabolism; Body Fluid Compartments - physiology; Diabetes; Electric Impedance; estimate equation; fat free mass (FFM); Female; Foot; Hand; hand-to-hand (HH); Humans; Male; Methods; Middle Aged; Models, Biological; Nutrients; Obesity - metabolism; Physical education; Reference Values; Sex Factors; standing position; Young Adult
• ISSN: 2072-6643; 2072-6643
• DOI: 10.3390/nu8100654

This study aimed to establish a hand-to-hand (HH) model for bioelectrical impedance analysis (BIA) fat free mass (FFM) estimation by comparing with a standing position hand-to-foot (HF) BIA model and dual energy X-ray absorptiometry (DXA); we also verified the reliability of the newly developed model. A total of 704 healthy Chinese individuals (403 men and 301 women) participated. FFM (FFM ) reference variables were measured using DXA and segmental BIA. Further, regression analysis, Bland-Altman plots, and cross-validation (2/3 participants as the modeling group, 1/3 as the validation group; three turns were repeated for validation grouping) were conducted to compare tests of agreement with FFM reference variables. In male participants, the hand-to-hand BIA model estimation equation was calculated as follows: FFM = 0.537 h²/Z - 0.126 year + 0.217 weight + 18.235 ( ² = 0.919, standard estimate of error (SEE) = 2.164 kg, = 269). The mean validated correlation coefficients and limits of agreement (LOAs) of the Bland-Altman analysis of the calculated values for FFM and FFM were 0.958 and -4.369-4.343 kg, respectively, for hand-to-foot BIA model measurements for men; the FFM (FFM ) and FFM were 0.958 and -4.356-4.375 kg, respectively. The hand-to-hand BIA model estimating equation for female participants was FFM = 0.615 h²/Z - 0.144 year + 0.132 weight + 16.507 ( ² = 0.870, SEE = 1.884 kg, = 201); the three mean validated correlation coefficient and LOA for the hand-to-foot BIA model measurements for female participants (FFM and FFM ) were 0.929 and -3.880-3.886 kg, respectively. The FFM and FFM were 0.942 and -3.511-3.489 kg, respectively. The results of both hand-to-hand and hand-to-foot BIA models demonstrated similar reliability, and the hand-to-hand BIA models are practical for assessing FFM.