Table 3 Regression coefficients β from multiple linear regression models for serum myostatin and IGF-1 after adjustment for age

Group^a

−0.918 ± 0.927 (0.326)

38.3 ± 27.4 (0.169)

Height (cm)

0.051 ± 0.058 (0.377)

3.503 ± 1.673 (0.041)*

Weight (kg)

−0.042 ± 0.029 (0.149)

1.169 ± 0.869 (0.184)

BMI (kg/m²)

−0.269 ± 0.111 (0.018)*

1.797 ± 3.476 (0.607)

Fat mass (%)

−0.141 ± 0.058 (0.018)*

0.695 ± 1.824 (0.705)

Fat-free mass (kg)

−0.014 ± 0.052 (0.789)

2.673 ± 1.524 (0.085)

Muscle mass (kg)

−0.033 ± 0.092 (0.723)

3.502 ± 2.717 (0.203)

Waist girth (cm)

−0.085 ± 0.043 (0.050)*

0.480 ± 1.333 (0.720)

Grip strength (kg)

−0.019 ± 0.078 (0.811)

3.229 ± 2.297 (0.166)

Estimated daily energy expenditure (kcal/day)

−0.001 ± 0.000 (0.125)

0.025 ± 0.013 (0.051)

IGF-1 (ng/ml)

0.001 ± 0.005 (0.883)

-

myostatin (ng/ml)

-

0.600 ± 4.072 (0.883)