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Table 1 Baseline characteristics based on levels of maximum walking speed
| Characteristic | Overall (n = 188) | Maximum walking speed | P value | |||
|---|---|---|---|---|---|---|
| Q1 (n = 47) | Q2 (n = 47) | Q3 (n = 47) | Q4 (n = 47) | |||
| Age (years) | 65 (10) | 73 (10) | 64 (8) | 63 (9) | 60 (9) | <0.001 |
| Women | 98 (52.1) | 24 (51) | 25 (53) | 24 (51) | 25 (53) | 0.99 |
| Body mass index (kg/m2) | 21.2 (3.2) | 20.3 (3.2) | 21.7 (3.3) | 20.7 (3.3) | 21.9 (2.8) | 0.42 |
| Hemodialysis duration (years) | 3.3 (1.4, 9.5) | 2.5 (1.2, 8.1) | 3.8 (2.0, 12.6) | 3.2 (1.8, 7.3) | 3.3 (1.0, 8.5) | 0.35 |
| Primary kidney disease | 0.19 | |||||
| Diabetic nephropathy | 63 (33.5) | 17 (36.2) | 17 (36.2) | 16 (34.0) | 13 (27.7) | |
| Glomerulonephritis | 61 (32.4) | 9 (19.1) | 15 (31.9) | 18 (38.3) | 19 (40.4) | |
| Hypertension | 16 (8.5) | 4 (8.5) | 5 (10.6) | 4 (8.5) | 3 (6.4) | |
| Polycystic renal disease | 7 (3.7) | 1 (2.1) | 0 (0) | 4 (8.5) | 2 (4.3) | |
| Other nephropathies | 41 (21.8) | 16 (34.0) | 10 (21.3) | 5 (10.6) | 10 (21.3) | |
| Comorbid condition | ||||||
| Presence of cardiac diseasea | 91 (48.4) | 31 (66.0) | 20 (42.6) | 26 (55.3) | 14 (29.8) | 0.003 |
| Peripheral vascular disease | 20 (10.6) | 7 (3.7) | 5 (2.7) | 4 (2.1) | 4 (2.1) | 0.72 |
| Presence of diabetes mellitus | 76 (40.4) | 19 (40.4) | 22 (46.8) | 18 (38.3) | 17 (36.2) | 0.74 |
| Comorbidity score | 4.8 (3.0) | 6.3 (2.8) | 4.7 (3.0) | 4.4 (2.9) | 3.6 (2.7) | <0.001 |
| Laboratory values | ||||||
| Hemoglobin (g/dL) | 10.3 (1.0) | 10.2 (0.9) | 10.0 (1.0) | 10.3 (0.9) | 10.4 (1.0) | 0.34 |
| Serum albumin (g/dL) | 3.9 (0.3) | 3.8 (0.3) | 3.8 (0.3) | 3.9 (0.3) | 4.0 (0.3) | 0.02 |
| Serum C-reactive protein (mg/dL) | 0.3 (0.7) | 0.4 (0.8) | 0.3 (0.7) | 0.3 (0.7) | 0.3 (0.4) | 0.61 |
| Walking ability | ||||||
| Maximum walking speed (m/min) | 87.5 (19.6) | 62.7 (11.6) | 81.4 (4.9) | 94.1 (5.6) | 111.9 (8.1) | <0.001 |
