Table 1. Patient characteristics in all and matched population.
| Characteristics | All (n = 1,060) | Propensity-score matched (n = 556)† | |||||||
| HD (n = 736) | PD (n = 324) | P value | HD (n = 278) | PD (n = 278) | P value | ||||
| Age at initiation of dialysis (years) | 58.1±14.0 | 51.1±13.4 | <0.001 | 51.9±14.5 | 51.6±13.0 | 0.770 | |||
| Sex (Male%) | 444 (60.3) | 194 (59.9) | 0.892 | 169 (60.8) | 168 (60.4) | 1.000 | |||
| Body mass index (kg/m2) | 23.3±3.4 | 22.7±3.3 | 0.005 | 22.7±3.0 | 22.7±3.3 | 1.000 | |||
| Primary renal disease, n (%) | |||||||||
| Diabetes | 367 (56.4) | 145 (48.2) | 0.003 | 130 (50.8) | 126 (47.7) | 0.282 | |||
| Hypertension | 119 (18.3) | 59 (19.6) | 47 (18.4) | 53 (20.1) | |||||
| Glomerulonephritis | 93 (14.3) | 71 (23.6) | 47 (18.4) | 62 (23.5) | |||||
| Others | 72 (11.1) | 26 (8.6) | 32 (12.5) | 23 (8.7) | |||||
| Comorbidity at initiation of dialysis, n (%) | |||||||||
| Congestive heart failure | 103 (14.6) | 42 (13.2) | 0.563 | 37 (13.3) | 36 (12.9) | 1.000 | |||
| Coronary artery disease | 98 (13.9) | 35 (11.0) | 0.228 | 27 (9.7) | 28 (10.1) | 1.000 | |||
| Peripheral vascular disease | 69 (9.8) | 20 (6.3) | 0.073 | 16 (5.8) | 15 (5.4) | 1.000 | |||
| Arrhythmia | 17 (2.4) | 5 (1.6) | 0.489 | 3 (1.1) | 4 (1.4) | 1.000 | |||
| Cerebrovascular disease | 88 (14.5) | 30 (9.4) | 0.170 | 16 (5.8) | 20 (7.2) | 0.606 | |||
| Chronic lung disease | 88 (12.5) | 16 (5.0) | <0.001 | 17 (6.1) | 15 (5.4) | 0.856 | |||
| Peptic ulcer disease | 55 (7.8) | 21 (6.6) | 0.523 | 16 (5.8) | 21 (7.6) | 0.497 | |||
| Moderate to severe chronic liver disease | 17 (2.4) | 10 (3.1) | 0.529 | 10 (3.6) | 10 (3.6) | 1.000 | |||
| Connective tissue disease | 70 (9.9) | 33 (10.3) | 0.843 | 24 (8.6) | 29 (10.4) | 0.564 | |||
| Malignancy | 60 (8.5) | 8 (2.5) | <0.001 | 14 (5.0) | 8 (2.9) | 0.277 | |||
| Laboratory data at initiation of dialysis | |||||||||
| Hemoglobin (g/dL) | 8.8±1.7 | 9.1±1.6 | 0.002 | 9.2±1.7 | 9.1±1.6 | 0.516 | |||
| Blood urea nitrogen (mg/dL) | 80±37 | 78±36 | 0.403 | 78±32 | 79±36 | 0.680 | |||
| Creatinine (mg/dL) | 8.2±3.5 | 8.5±3.6 | 0.182 | 8.4±3.3 | 8.6±3.7 | 0.717 | |||
| Albumin (g/dL) | 3.3±0.7 | 3.4±0.7 | 0.224 | 3.5±0.7 | 3.4±0.7 | 0.324 | |||
| Calcium (mg/dL) | 7.8±1.0 | 7.8±1.1 | 0.950 | 7.8±1.1 | 7.7±1.1 | 0.790 | |||
| Phosphorus (mg/dL) | 5.4±1.9 | 5.5±1.8 | 0.753 | 5.5±1.7 | 5.5±1.8 | 0.705 | |||
| Estimated GFR (ml/min/1.73 m2) | 7.5±4.4 | 7.3±3.6 | 0.354 | 7.1±3.2 | 7.2±3.6 | 0.630 | |||
| Urine volume (ml/day) | 637±615 | 768±674 | 0.002 | 783±674 | 764±665 | 0.740 | |||
Propensity-score matching was done in patients who survived until day 90. Data are expressed as number (%) or mean±standard deviation. P-values were estimated by chi-square, Fisher’s exact and student t tests as appropriate. Abbreviations: HD, hemodialysis; PD, peritoneal dialysis; GFR, glomerular filtration rate.