Table 1.
Descriptive data according to gender and age subgroups.
| Sex | Variables | 18–29.9 | 30–39.9 | 40–49.9 | 50–59.9 | 60–69.9 | 70–79.9 | ANOVA |
|---|---|---|---|---|---|---|---|---|
| Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | |||
| Males | PM (kg) ** | 14.16 ± 1.76 | 14.19 ± 1.81 | 14.06 ± 1.71 | 13.64 ± 1.65 | 13.01 ± 1.72 | 11.05 ± 1.59 | F = 14.54, PE2 = 0.01 |
| PP (%) ** | 17.14 ± 1.36 | 15.65 ± 1.46 | 15.36 ± 1.34 | 15.02 ± 1.11 | 14.32 ± 1.52 | 13.58 ± 0.89 | F = 411.46, PE2 = 0.28 | |
| PMI (kg/m2) ** | 4.22 ± 0.35 | 4.28 ± 0.38 | 4.28 ± 0.37 | 4.2 ± 0.29 | 4.05 ± 0.41 | 3.72 ± 0.31 | F = 14.59, PE2 = 0.01 | |
| SMM (kg) ** | 40.73 ± 5.31 | 40.78 ± 5.53 | 40.4 ± 5.13 | 39.12 ± 4.98 | 37.24 ± 5.19 | 30.91 ± 4.82 | F = 14.86, PE2 = 0.01 | |
| PSMM (%) ** | 49.27 ± 3.96 | 44.95 ± 4.28 | 44.12 ± 3.88 | 43.04 ± 3.17 | 40.94 ± 4.3 | 37.94 ± 2.68 | F = 409.57, PE2 = 0.28 | |
| SMMI (kg/m2) ** | 12.13 ± 1.06 | 12.3 ± 1.18 | 12.29 ± 1.13 | 12.04 ± 0.9 | 11.59 ± 1.23 | 10.39 ± 1.03 | F = 14.73, PE2 = 0.01 | |
| PFI (kg) ** | 1.596 ± 0.98 | 0.874 ± 0.46 | 0.784 ± 0.40 | 0.673 ± 0.22 | 0.599 ± 0.23 | 0.466 ± 0.08 | F = 273.55, PE2 = 0.20 | |
| FFM (kg) ** | 71.1 ± 8.95 | 71.49 ± 9.18 | 71.00 ± 8.86 | 69.01 ± 8.39 | 66.91 ± 9.43 | 57.13 ± 8.63 | F = 9.69, PE2 = 0.01 | |
| FFMI (kg/m2) ** | 21.19 ± 1.75 | 21.56 ± 1.90 | 21.6 ± 1.94 | 21.24 ± 1.46 | 20.84 ± 2.37 | 19.20 ± 1.76 | F = 14.60, PE2 = 0.01 | |
| Females | PM (kg) ** | 9.31 ± 1.37 | 9.55 ± 1.09 | 9.49 ± 1.04 | 9.02 ± 1.11 | 9.19 ± 1.54 | 7.89 ± 0.67 | F = 11.54, PE2 = 0.02 |
| PP (%) | 14.76 ± 1.56 | 13.95 ± 1.79 | 13.43 ± 1.61 | 12.54 ± 1.51 | 11.86 ± 1.48 | 11.84 ± 1.09 | F = 156.64, PE2 = 0.19 | |
| PMI (kg/m2) ** | 3.22 ± 0.31 | 3.34 ± 0.33 | 3.37 ± 0.29 | 3.33 ± 0.32 | 3.45 ± 0.48 | 3.29 ± 0.17 | F = 30.30, PE2 = 0.04 | |
| SMM (kg) | 26.09 ± 4.17 | 26.81 ± 3.31 | 26.66 ± 3.13 | 25.22 ± 3.34 | 25.73 ± 4.66 | 21.75 ± 2.05 | F = 11.61, PE2 = 0.02 | |
| PSMM (%) ** | 41.29 ± 4.49 | 39.14 ± 5.04 | 37.66 ± 4.55 | 35.01 ± 4.21 | 33.13 ± 4.09 | 32.63 ± 3.07 | F = 151.77, PE2 = 0.19 | |
| SMMI (kg/m2) ** | 9.03 ± 0.98 | 9.37 ± 1.01 | 9.46 ± 0.87 | 9.29 ± 0.96 | 9.67 ± 0.46 | 9.09 ± 0.54 | F = 26.12, PE2 = 0.04 | |
| PFI (kg) ** | 0.671 ± 0.31 | 0.563 ± 0.28 | 0.473 ± 0.20 | 0.378 ± 0.14 | 0.332 ± 0.15 | 0.322 ± 0.07 | F = 92.77, PE2 = 0.12 | |
| FFM (kg) ** | 47.34 ± 6.87 | 48.67 ± 5.51 | 48.43 ± 5.33 | 46.18 ± 5.82 | 47.49 ± 8.25 | 41.53 ± 4.30 | F = 10.55, PE2 = 0.02 | |
| FFMI (kg/m2) ** | 16.39 ± 1.53 | 17.02 ± 1.63 | 17.19 ± 1.46 | 17.03 ± 1.66 | 17.86 ± 2.75 | 17.34 ± 1.07 | F = 40.34, PE2 = 0.06 |
** Significant at p < 0.01. PM—protein mass, PP—percent protein, PMI—protein mass index, SMM—skeletal muscle mass, PSMM—percent of SMM, SMMI—skeletal muscle mass index, PFI—protein/fat index, FFM—fat-free mass, FFMI—fat-free mass index, PE2—Partial eta square.