Baseline demographics and clinical characteristics of patients
| Characteristics | Patients (n=578) | RLS patients (n=83) | Non-RLS patients (n=495) | P value |
| Male sex (%) | 363 (62.8) | 46 (55.4) | 317 (64.0) | 0.133 |
| Mean age (years) | 59.45±14.06 | 56.39±11.73 | 59.97±14.36 | 0.014 |
| Premorbidity | ||||
| Type II diabetes (%) | 230 (39.8) | 27 (32.5) | 203 (41.0) | 0.144 |
| Hypertension (%) | 260 (45.0) | 35 (42.2) | 225 (45.5) | 0.578 |
| SHPT (%) | 485 (83.9) | 70 (84.3) | 415 (83.8) | 0.909 |
| Dialysis duration (years) | 3.55±3.24 | 5.44±4.56 | 3.24±2.85 | <0.001 |
| Dialysate calcium concentration of 3.0 mEq/L (%) | 274 (47.4) | 39 (47.0) | 235 (47.5) | 0.934 |
| BMI | 21.98±3.44 | 21.85±3.43 | 22.00±3.44 | 0.714 |
| Haemodialytic modality | ||||
| High-flux haemodialysis (%) | 206 (35.6) | 25 (30.1) | 181 (36.6) | 0.257 |
| HDF weekly (%) | 272 (47.1) | 43 (51.8) | 229 (46.3) | 0.349 |
P value, RLS cohort versus non-RLS cohort.
BMI, body mass index; HDF, haemodiafiltration; RLS, restless legs syndrome; SHPT, secondary hyperparathyroidism.