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Table 2 Correlation analysis between myostatin and IGF-1 and other parameters. The data are expressed as Pearson’s correlation coefficient (p value)

From: Serum reference value of two potential doping candidates—myostatin and insulin-like growth factor-I in the healthy young male

  Myostatin (ng/ml) IGF-1 (ng/ml)
N 57 57
Groupa −0.045 (0.740) 0.269 (0.043)*
Age (year) −0.335 (0.011)* −0.470 (<0.001)**
Height (cm) 0.146 (0.280) 0.287 (0.031)*
Weight (kg) −0.133 (0.324) 0.226 (0.091)
BMI (kg/m2) −0.248 (0.063) 0.125 (0.354)
Fat mass (%) −0.304 (0.022)* 0.036 (0.789)
Fat-free mass (kg) 0.040 (0.768) 0.303 (0.022)*
Muscle mass (kg) 0.024 (0.857) 0.246 (0.065)
Waist girth (cm) −0.248 (0.063) 0.040 (0.767)
Grip strength (kg) 0.029 (0.832) 0.246 (0.065)
Estimated daily energy expenditure (kcal/day) −0.067 (0.620) 0.380 (0.004)**
Myostatin (ng/ml) - 0.174 (0.195)
IGF-1 (ng/ml) 0.174 (0.195) -
  1. *: p <0.05
  2. **: p <0.01
  3. a: Control group is 0; athlete group is 1