Table 3.
Bioelectric impedance parameters in the total population and according to sarcopenia groups.
| Total Population (N = 79) |
Absence of Sarcopenia (N = 27) | Probable Sarcopenia (N = 20) | Confirmed Sarcopenia (N = 32) | p-Value | |
|---|---|---|---|---|---|
| BMR (Kcal) | 1282.9 ± 31.8 | 1358.9 ± 49.6 * | 1420.0 ± 79.6 # | 1133.1 ± 29.2 #,* | 0.00003 |
| PhA | 4.6 ± 0.3 | 5.1 ± 0.4 * | 5.4 ± 0.8 # | 3.7 ± 0.2 #,* | 0.003 |
| TBW (L) | 42.1 ± 4.3 | 39.0 ± 1.6 * | 43.2 ± 1.2 # | 44.1 ± 10.7 #,* | 0.00008 |
| LM (kg) | 57.0 ± 5.9 | 53.3 ± 2.1 *,# | 59.0 ± 1.7 # | 58.8 ± 14.6 * | 0.00001 |
| ECM (kg) | 30.0 ± 1.1 | 29.8 ± 1.9 | 33.6 ± 2.9 | 27.9 ± 1.2 | 0.2 |
| BCM (kg) | 21.4 ± 1.0 | 23.9 ± 1.3 * | 25.6 ± 2.5 # | 16.6 ± 0.9 #,* | 0.00004 |
| ECM/BCM | 2.7 ± 1.0 | 1.6 ± 0.4 * | 5.3 ± 3.9 | 1.9 ± 0.2 * | 0.008 |
| Percentage of Cells | 41.3 ± 1.5 | 45.2 ± 2.2 * | 43.7 ± 4.0 # | 36.6 ± 1.5 #,* | 0.003 |
| BFM (%) | 27.7 ± 1.4 | 26.5 ± 2.2 | 24.8 ± 3.4 | 30.3 ± 2.1 | 0.29 |
| BFM (kg) | 25.2 ± 2.3 | 20.5 ± 2.2 | 20.5 ± 2.6 | 21.0 ± 2.1 | 0.99 |
| R (Ω) | 584.2 ± 14.9 | 538.9 ± 21.0 $,* | 437.5 ± 25.0 $,# | 625.1 ± 19.6 #,* | 0.00001 |
| Xc (Ω) | 42.8 ± 2.2 | 47.4 ± 4.4 | 42.8 ± 5.2 | 39.1 ± 2.2 | 0.36 |
| RI (cm2/Ω) | 52.5 ± 1.7 | 54.1 ± 2.5 $,* | 65.2 ± 3.3 $,# | 43.3 ± 1.7 #,* | 0.00000 |
| ASM (kg) | 18.4 ± 0.5 | 19.3 ± 0.8 $,* | 21.8 ± 0.9 $,# | 15.4 ± 0.5 #,* | 0.00000 |
| ASM/BMI | 0.7 ± 0.0 | 0.7 ± 0.0 * | 0.8 ± 0.0 # | 0.6 ± 0.0 #,* | 0.004 |
Data were expressed as mean ± standard error. The difference between groups was tested by the Kruskal–Wallis-Multiple comparison Z-value test (Dunn’s test). Similar symbols (*,#,$) indicate statistical significance between groups. Abbreviations: ASM, appendicular skeletal mass; BCM, body cell mass; BFM, body fat mass; BMI, body mass index; BMR, basal metabolic rate; ECM, extracellular mass; LM, lean mas; N, number of subjects; PhA, phase angle; R, resistance; RI, resistive index (height2/resistance); Xc, reactance.