Table 1.
Classical anthropometric, muscle ultrasound, and bioimpedance parameters.
| Parameters | Mean ± SD |
|---|---|
| Weight (kg) | 83.5 ± 14.6 |
| BMI (kg/m2) | 32.1 ± 1.6 |
| Waist circumference | 101.2 ± 10.6 |
| Phase angle (°) | 6.1 ± 0.7 |
| Resistance Ohms | 512.2 ± 68.7 |
| Reactance Ohms | 55.2 ± 9.9 |
| Fat mass(kg) | 33.2 ± 10.5 |
| Fat-free mass (kg) | 50.4 ± 5.6 |
| SMM | 25.1 ± 5.9 |
| aSMM | 19.9 ± 2.9 |
| SMMI | 9.7 ± 2.1 |
| aSMMI | 7.7 ± 0.9 |
| Right muscle area QRF (cm2/m2) | 1.61 ± 0.5 |
| Left muscle area QRF (cm2/m2) | 1.62 ± 0.6 |
| Right circumference area QRF (cm/m2) | 3.28 ± 0.5 |
| Left circumference area QRF (cm/m2) | 3.39 ± 0.6 |
| Right thickness (cm/m2) | 0.55 ± 0.1 |
| Left thickness (cm/m2) | 0.54 ± 0.2 |
| Ecointensity (points/m2) | 12.00 ± 5.8 |
BIA measured the geometrical components of impedance (Z), resistance (R), and the capacitance component (X). The BIA provided data regarding fat mass (FM), fat-free mass (FFM), skeletal muscle mass (SMM), appendicular muscle mass (aSMM), skeletal muscle mass index (SMMI) as SMMI divided by squared height, and appendicular muscle mass index (aSMMI) as SMI divided by squared height. QRF: quadriceps rectus femoris. Ultrasound parameters were standardized dividing by the patient's height squared; Y axis muscle thickness, circumference, cross-sectional area, and the mean gray value (MGV) (Echo-intensity).