Table 1.
Coefficients from regression models deriving equations for estimating fat free mass by fitting height, weight and impedance as separate variables in the model and adding interaction terms for ethnicity and gender.
Table 2.
Coefficients from regression models deriving equations for estimating fat free mass by fitting height2/impedance as a variable in the model and adding interaction terms for ethnicity and gender.
Table 3.
Coefficients from regression models deriving equations for estimating fat free mass by fitting height2/impedance and weight as variables in the model and adding interaction terms for ethnicity and gender.
Figure 1.
Bland-Altman plots for equations for deriving fat free mass from bioelectrical impedance analysis in ABCC Study by ethnicity.
Equation A1, fat free mass = height+weight+Z (generic model); Equation A4, fat free mass = height+weight+Z (ethnic- and gender-specific model); Equation C1, fat free mass = height2/Z+weight (generic model); Equation C4, fat free mass = height2/Z+weight (ethnic- and gender-specific model). Abbreviations: FFM, fat free mass; WE, white European; BAC, black African-Caribbean; SA, South Asian; Z, impedance.
Table 4.
Comparison of ethnic differences in body composition using different equations for deriving fat free mass in ABCC Study data.
Table 5.
Comparison of ethnic differences in body composition using different equations for deriving fat free mass in CHASE data.