Table 4.
Baseline characteristics after propensity score matching between high-flux dialyzers (reference) and other dialyzer types.
| Matched | Matched | |||||
|---|---|---|---|---|---|---|
| Low-flux | High-flux | P value | Protein-leaking | High-flux | P value | |
| n (%) | 1,229 | 1,229 | - | 6,214 | 6,214 | - |
| Age (years) | 75.2 ± 10.6 | 75.3 ± 10.0 | 0.730 | 70.7 ± 11.5 | 70.7 ± 12.1 | 0.815 |
| Sex (% female) | 49.5 | 50.7 | 0.518 | 42.9 | 43.6 | 0.322 |
| Dialysis duration (years) | 3 [1–7] | 4 [2–7] | 0.934 | 5 [2–9] | 5 [2–9] | 0.938 |
| Presence of DM (%) | 40.7 | 38.5 | 0.513 | 26.3 | 26.2 | 0.869 |
| Comorbid CVD (%) | 36.8 | 35.2 | 0.401 | 29.4 | 29.2 | 0.828 |
| Body mass index (kg/m2) | 19.9 ± 3.8 | 19.9 ± 3.6 | 0.957 | 20.7 ± 3.5 | 20.7 ± 3.5 | 0.570 |
| Hemoglobin (g/dL) | 9.9 ± 1.5 | 9.9 ± 1.4 | 0.413 | 10.2 ± 1.4 | 10.1 ± 1.4 | 0.720 |
| Serum albumin (g/dL) | 3.3 ± 0.5 | 3.3 ± 0.5 | 0.775 | 3.5 ± 0.5 | 3.5 ± 0.5 | 0.721 |
| Calcium (mg/dL) | 8.6 ± 0.9 | 8.6 ± 0.9 | 0.597 | 8.8 ± 0.8 | 8.8 ± 0.8 | 0.748 |
| Phosphate (mg/dL) | 4.9 ± 1.7 | 4.8 ± 1.6 | 0.569 | 5.1 ± 1.5 | 5.1 ± 1.5 | 0.521 |
| Intact PTH (pg/mL) | 110 [54–189] | 97 [53–178] | 0.861 | 107 [53–188] | 107 [54–192] | 0.179 |
| β2-microglobulin (mg/L) | 30.0 ± 11.8 | 29.8 ± 9.7 | 0.647 | 29.0 ± 8.3 | 29.2 ± 8.6 | 0.349 |
| C-reactive protein (mg/dL) | 1.0 [0.5–2.6] | 1.0 [0.5–2.5] | 0.421 | 0.1 [0.1–0.6] | 0.1 [0.1–0.6] | 0.386 |
| Kt/V | 1.24 ± 0.30 | 1.26 ± 0.29 | 0.213 | 1.35 ± 0.28 | 1.35 ± 0.29 | 0.979 |
| nPCR (g/kg/day) | 0.78 ± 0.20 | 0.78 ± 0.19 | 0.337 | 0.83 ± 0.18 | 0.83 ± 0.18 | 0.388 |
| %CGR (%) | 66.4 ± 30.0 | 68.9 ± 31.2 | 0.215 | 83.4 ± 29.7 | 83.2 ± 30.3 | 0.826 |
%CGR, percent creatinine generation rate; CVD, cardiovascular disease; DM, diabetes mellitus; nPCR, normalized protein catabolic rate; PTH, parathyroid hormone.