Table 4 Prediction values of physiologic variables including age, race, gender, and absolute values (left 2 columns) or percent bone, lean and fat mass (right 2 columns) for plasma leptin and leptin soluble receptor concentrations, and leptin soluble receptor:leptin molar ratio

Dependent variable – plasma leptin (ng/mL)

Independent variables: R² 0.37

Beta (p)

Independent variables: R² 0.37

Beta (p)

Age (d)

-0.65 (0.001)

Age (d)

-0.34 (0.01)

Fat (g)

0.44 (0.003)

Fat%

0.42 (0.003)

Dependent variable – plasma soluble leptin receptor (ng/mL)

Independent variables: R² 0.22

Independent variables: R² 0.43

Fat (g)

0.47 (0.004)

BMC%

-0.63 (0.004)

Lean%

-14.1 (0.001)

Fat%

-13.8 (0.001)

Dependent variable – plasma soluble leptin receptor : leptin ratio

Independent variables: R² 0.54

Independent variables: R² 0.59

Age (d)

-0.71 (0.001)

BMC%

-0.59 (0.002)

Fat (g)

0.72 (0.001)

Lean%

-7.04 (0.02)

Fat%

-6.42 (0.03)