Table 1.
Baseline characteristics of the hemodialysis sessions analyzed in this study
| Variables | Total (n=261,647)a |
|---|---|
| Age (yr) | 62±15 |
| Male, n (%) | 151,531 (58) |
| Hemodialysis type, n (%) | |
| Hemodialysis | 243,155 (92) |
| Hemodiafiltration | 17,123 (7) |
| Others | 1369 (0.5) |
| The number of sessions per wk (times) | 3±0.5 |
| The time per session (h) | 4.0 (3.8–4.0)b |
| Incident hemodialysis, n (%) | 27,230 (10) |
| Vascular access, n (%) | |
| Arteriovenous fistula | 183,330 (70) |
| Arteriovenous graft | 14,110 (5) |
| Subcutaneously tunneled catheter | 46,994 (18) |
| Temporary internal jugular venous catheterization | 12,848 (5) |
| Others | 4345 (2) |
| Predialysis weight (kg) | 58±12 |
| Setting of ultrafiltration (L) | 2.0 (1.2–2.7) |
| Use of anticoagulant, n (%) | |
| Heparin | 172,023 (66) |
| Nafamostat mesilate | 43,198 (16) |
| None | 46,694 (18) |
| Setting of blood flow rate (ml/min) | 250 (230–280) |
| Predialysis systolic BP (mm Hg) | 139 (121–155) |
| Predialysis diastolic BP (mm Hg) | 73 (65–82) |
| Predialysis mean arterial pressure (mm Hg) | 95 (85–106) |
| Predialysis heart rate (beats/min) | 75 (66–86) |
| Blood findings | |
| Hemoglobin (g/dl) | 10.4 (9.5–11.2) |
| Albumin (g/dl) | 3.7 (3.1–4.0) |
| Calcium (mg/dl) | 8.9 (8.3–9.4) |
| Phosphate (mg/dl) | 4.4 (3.4–5.4) |
| Sodium (mmol/L) | 137 (135–139) |
| Potassium (mmol/L) | 4.6 (4.1–5.2) |
| Dialysate findings | |
| Dialysate sodium (mmol/L) | 137±1.3 |
| Dialysate potassium (mmol/L) | 2.5±0.3 |
| Dialysate calcium (mmol/L) | 1.5±0.1 |
| Dialysate bicarbonate (mmol/L) | 33.8±1.0 |
| Dialysate temperature (°C) | 36.7±0.5 |
a
Total number of patients was 9292.
b
The mean value was 3.7±0.6 h per session.