Comparisons of the baseline data
| Parameter | USPD (n=309) | USHD (n=233) | P value |
| Males, n (%) | 179 (57.9) | 123 (52.8) | 0.248 |
| Age (years) | 73.1±5.6 | 72.6±7.5 | 0.622 |
| Duration of dialysis (months) | 22.9±5.1 | 24.6±5.2 | <0.001 |
| Primary disease | |||
| Chronic glomerulonephritis, n (%) | 116 (37.4) | 119 (51.1) | 0.065 |
| Diabetic nephropathy, n (%) | 105 (34.0) | 170 (7.3) | 0.002 |
| Hypertensive renal lesion, n (%) | 161 (5.2) | 114 (4.9) | 1.000 |
| Lupus nephritis, n (%) | 65 (2.1) | 30 (1.3) | 1.000 |
| Polycystic kidney, n (%) | 176 (5.7) | 28 (12.2) | 0.260 |
| Unknown causes, n (%) | 67 (21.8) | 43 (18.4) | 0.502 |
| Comorbidities | |||
| Coronary artery-related events, n (%) | 76 (24.5) | 74 (31.7) | 0.440 |
| Diabetes, n (%) | 152 (49.1) | 74 (31.7) | 0.090 |
| Hypertension, n (%) | 175 (56.5) | 131 (56.1) | 0.816 |
| Heart failure, n (%) | 128 (41.5) | 142 (61.0) | 0.061 |
| Cerebrovascular events, n (%) | 35 (11.3) | 45 (19.5) | 0.209 |
USHD, urgent-start haemodialysis; USPD, urgent-start peritoneal dialysis.