Table 3 Prediction values of physiologic variables including age, race, gender, and absolute values (left 2 columns) or age and gender specific Z scores (right 2 columns) of anthropometric measurements for plasma concentrations of leptin and leptin soluble receptor*, and leptin soluble receptor:leptin molar ratio.

Dependent variable – plasma leptin (ng/mL)

Independent variables: R² 0.49

Beta (p)

Independent variables: R² 0.46

Beta (p)

Weight (g)

1.87 (0.001)

Weight Z score

0.83 (0.001)

Length (cm)

-2.17 (0.001)

Length Z score

-0.44 (0.01)

Gender (Female = 1, male = 0)

0.27 (0.03)

Dependent variable – plasma soluble leptin receptor : leptin molar ratio

Independent variables: R² 0.50

Independent variables: R² 0.44

Age (d)

-0.75 (0.001)

Weight Z score

0.66 (0.001)

Weight (g)

1.51 (0.001)

Gender (Female = 1, male = 0)

0.39 (0.01)