# Table 4

Comparison of fat mass (FM) and lean mass (LM) determined by DXA and estimated by the equations 1 to 19 (means and SD) in cats
DXA (kg) Estimated values (kg) Equation number p value (t-Test) Linear regression r2
FM
M (n = 24) 1.49 (0.71) 2.88 (0.94) 1 <0.0001 y = 0.728x - 0.605 0.93
F (n = 24) 1.46 (0.60) 1.37 (0.57) 2 = 0.60 y = 1.014x + 0.069 0.92
1.53 (0.59) 3 = 0.67 y = 0.976x - 0.036 0.94
M and F (n = 48) 1.48 (0.65) 1.49 (0.62) 4 = 0.90 y = 1.002x - 0.019 0.91
1.40 (0.59) 5 = 0.55 y = 1.034x + 0.028 0.88
1.26 (0.56) 6 = 0.09 y = 1.086x + 0.105 0.88
T0 (n = 16) 1.95 (0.59) 1.89 (0.52) 7 = 0.78 y = 1.042x - 0.023 0.85
T1 (n = 16) 1.43 (0.45) 1.60 (0.61) 8 = 0.43 y = 0.932x - 0.058 0.93
1.61 (0.58) 9 = 0.38 y = 0.945x - 0.094 0.85
1.41 (0.54) 10 = 0.94 y = 1.004x + 0.010 0.86
T2 (n = 16) 1.05 (0.45) 2.21 (0.61) 11 <0.0001 y = 0.691x - 0.473 0.89
2.59 (0.68) 12 <0.0001 y = 0.612x - 0.535 0.87
LM
M (n = 24) 3.04 (0.52) 8.19 (0.48) 13 <0.0001 y = 0.882x - 4.179 0.67
F (n = 24) 2.49 (0.40) 1.79 (0.27) 14 <0.0001 y = 1.299x + 0.168 0.79
M and F (n = 48) 2.76 (0.53) 1.59 (0.25) 15 <0.0001 y = 1.868x - 0.202 0.75
1.15 (0.19 16 <0.0001 y = 2.047x + 0.402 0.52
T0 (n = 16) 2.85 (0.54) 3.13 (0.55) 17 = 0.15 y = 0.925x - 0.051 0.87
T1 (n = 16) 2.77 (0.54) 1.68 (0.36) 18 <0.0001 y = 2.008x - 0.210 0.78
T2 (n = 16) 2.68 (0.54) 0.44 (0.15) 19 <0.0001 y = 2.651x + 1.509 0.56

M, males; F, females; T0 (before weight loss [WL]); T1 (after 10% of WL); T2 (after 20% of WL); y = estimated value; x = determined value.

Borges et al.

Borges et al. BMC Veterinary Research 2012 8:111   doi:10.1186/1746-6148-8-111