Table 1 Baseline characteristics of study subjects
| Characteristics | Total | Non-social frailty | Social frailty | |
|---|---|---|---|---|
| (n = 16) | (n = 12) | (n = 4) | P value | |
| Age (years) | 71.5 (64.8–78.0) | 70.5 (64.8–73.5) | 76.0 (69.5–78.3) | 0.43 |
| Female sex (%) | 8 (50.0) | 6 (50.0) | 2 (50.0) | 1.0 |
| Height (cm) | 159.6 ± 10.4 | 161.2 ± 8.6 | 154.6 ± 14.9 | 0.28 |
| Body weight (kg) | 51.4 ± 12.2 | 52.1 ± 12.7 | 49.2 ± 12.1 | 0.69 |
| Body mass index (kg/m2) | 19.5 (18.5–20.7) | 19.1 (17.8–20.7) | 20.3 (20.0–20.7) | 0.47 |
| Dialysis vintage (months) | 83.1 ± 60.4 | 68.4 ± 49.0 | 127.3 ± 77.3 | 0.092 |
| Charlson comorbidity index | 5.0 (4–6.3) | 5.0 (4.8–6.3) | 4.0 (4.0–4.8) | 0.23 |
| Number of medications | 6.3 ± 3.0 | 6.2 ± 3.4 | 6.8 ± 1.5 | 0.75 |
| Gait speed (m/sec) | 1.04 ± 0.30 | 1.15 ± 0.26 | 0.70 ± 0.12 | 0.005 |
| SPPB | 12.0 (10.0–12.0) | 12.0 (12.0–12.0) | 10.0 (9.5–10.3) | 0.008 |
| Grip strength (kg) | 25.1 ± 7.7 | 25.8 ± 6.9 | 22.9 ± 10.6 | 0.53 |
| ASMI (kg/m2) | 6.4 ± 0.9 | 6.6 ± 0.9 | 6.1 ± 1.1 | 0.46 |
| Hemoglobin (g/dL) | 11.3 (11.1–11.7) | 11.3 (11.3–11.7) | 10.7 (10.0–11.2) | 0.11 |
| Albumin (g/dL) | 3.65 ± 0.26 | 3.67 ± 0.21 | 3.58 ± 0.39 | 0.52 |
|
Blood urea nitrogen (mg/dL) | 52.2 ± 12.9 | 54.5 ± 13.3 | 45.2 ± 9.8 | 0.22 |
| Creatinine (mg/dL) | 8.65 ± 2.22 | 8.58 ± 2.33 | 8.86 ± 2.16 | 0.84 |
| Phosphate (mg/dL) | 5.1 ± 1.4 | 5.0 ± 1.2 | 5.5 ± 2.0 | 0.53 |
| Total cholesterol (mg/dL) | 196.7 ± 41.3 | 196.6 ± 48.2 | 197.0 ± 5.0 | 0.99 |
| C-reactive protein (mg/dL) | 0.07 (0.04–0.11) | 0.07 (0.05–0.09) | 0.10 (0.04–0.30) | 0.54 |