Bioelectrical impedance analysis results
| Amputation (n=20) | No amputation (n=22) | Control (n=20) | P-value | ||
|---|---|---|---|---|---|
| Age (y) | 78.5±6.3 (66.0~93.0) | 78.0±7.4 (61.0~92.0) | 75.3±3.8 (71.0~84.0) | 0.216 | |
| Weight (kg) | 53.4±11.4 (31.9~76.0) |
54.9±8.4 (40.1~69.1) |
61.1±9.6 (41.2~75.8) |
0.037* | |
| Height (cm) | 155.2±10.9 (130.0~172.0) | 153.0±7.6 (134.0~165.0) | 158.5±10.0 (142.8~176.2) | 0.180 | |
| Body mass index (kg/m2) | 22.0±3.5 (15.1~29.0) | 23.4±3.0 (17.9~30.6) | 24.3±2.8 (19.6~30.3) | 0.078 | |
| Percent body fat (%) | 29.1±10.4 (9.7~44.6) | 35.8±8.3 (18.2~49.5) | 31.7±8.8 (17.3~45.1) | 0.066 | |
| Skeletal muscle mass (kg) | 19.6±5.6 (9.5~29.8) |
18.2±3.9 (12.0~26.2) |
22.5±5.6 (15.2~32.5) |
0.028* | |
| ECW ratio | Whole body | 0.410±0.011 (0.392~0.431) |
0.401±0.007 (0.391~0.415) |
0.393±0.009 (0.378~0.408) |
<0.001* |
| Right arm | 0.385±0.007 (0.374~0.406) |
0.385±0.006 (0.376~0.401) |
0.380±0.004 (0.372~0.387) |
0.005* | |
| Left arm | 0.385±0.007 (0.373~0.397) |
0.385±0.005 (0.377~0.394) |
0.382±0.004 (0.376~0.390) |
0.042* | |
| Trunk | 0.406±0.010 (0.388~0.420) |
0.401±0.007 (0.390~0.415) |
0.392±0.010 (0.377~0.408) |
<0.001* | |
| Right leg | 0.415±0.014 (0.374~0.436) |
0.406±0.010 (0.389~0.424) |
0.397±0.012 (0.375~0.419) |
<0.001* | |
| Left leg | 0.418±0.017 (0.385~0.452) |
0.408±0.008 (0.395~0.426) |
0.396±0.011 (0.379~0.416) |
<0.001* | |
| Phase angle (°) | Whole body | 4.2±1.2 (2.1~7.1) |
4.4±0.7 (2.9~5.4) |
5.0±0.8 (3.8~6.4) |
0.029* |
| Right arm | 4.6±1.2 (2.5~6.9) | 4.7±0.9 (2.5~6.5) | 5.1±0.7 (4.0~6.3) | 0.170 | |
| Left arm | 4.3±1.4 (1.9~6.9) | 4.4±0.6 (3.1~5.6) | 5.0±0.7 (3.8~6.1) | 0.065 | |
| Trunk | 4.8±1.0 (3.0~6.9) | 5.1±0.7 (3.1~6.2) | 5.5±1.1 (3.1~7.8) | 0.075 | |
| Right leg | 3.8±1.2 (1.8~7.4) |
4.1±0.9 (2.5~6.0) |
4.8±1.1 (3.0~6.9) |
0.018* | |
| Left leg | 3.8±1.1 (2.5~6.1) |
4.0±0.8 (2.5~5.1) |
4.9±1.1 (3.2~6.8) |
0.001* | |
| Xc/Ht (W) | 27.2±5.5 (16.8~37.6) |
30.0±6.7 (18.7~45.9) |
32.0±4.2 (23.1~39.5) |
0.031* | |
| R/Ht (W) | 387.5±79.2 (260.7~531.9) | 392.2±95.5 (269.6~664.3) | 374.6±69.6 (266.6~505.0) | 0.780 | |
All values are mean±Standard deviation (range). All group values were tested by one-way analysis of variance (ANOVA) with Tukey’s multiple comparisons test.
a,b,cDifferent letters represent significant differences (P<0.05) by ANOVA.
BMI=body mass index; ECW=extracellular water; Z/H=impedance/height; Xc/Ht=reactance/height; R/Ht=resistance/height.
