Table 1.
Physical characteristics and muscle quantity and quality indices of the participants
| Variables | Young group (n=19, 38 legs) mean±SD | Older group (n=21, 42 legs) mean±SD | P-value |
|---|---|---|---|
| Age (years) | 22.7±1.5 | 70.6±4.8 | <0.001 |
| Number of women (n (%)) | 10 (52.6%) | 8 (38.1%) | 0.192 |
| Height (cm) | 160.0±5.9 | 158.3±7.8 | 0.001 |
| Weight (kg) | 59.2±7.7 | 57.8±8.6 | 0.599 |
| BMI (kg/m2) | 21.4±2.0 | 23.0±2.4 | 0.029 |
| MT (mm) | 54.1±4.3 | 45.2±5.6 | <0.001 |
| FT (mm) | 11.5±4.8 | 10.6±5.2 | 0.457 |
| EI | 15.6±3.3 | 19.9±6.4 | 0.001 |
| Muscle CSA (cm2) | 130.0±21.2 | 100.9±19.4 | <0.001 |
| CT value (HU) | 56.8±4.2 | 51.1±4.3 | <0.001 |
| %LDMA (%) | 8.4±3.6 | 14.8±5.1 | <0.001 |
Abbreviations: BMI, body mass index; CSA, cross-sectional area; CT, computed tomography; EI, echo intensity; FT, fat thickness of front thigh; HU, Hounsfield units; %LDMA, percentage of low-density muscle area; MT, muscle thickness of front thigh.