Table 5 Comparison of variables before and after propensity score matching between the type IIa and IIb groups.
From: Current dialyzer classification in Japan and mortality risk in patients undergoing hemodialysis
Variables | Before matching | After matching | ||||
|---|---|---|---|---|---|---|
II a | II b | P-value | II a | II b | P-value | |
n (%male) | 64,155 (70.9) | 4325 (76.1) | < 0.0001 | 2555 (75.6) | 2555 (76.1) | 0.695 |
Age, years | 66.4 ± 12.1 | 63.3 ± 11.9 | < 0.0001 | 63.3 ± 12.2 | 63.2 ± 11.8 | 0.612 |
Vintage, months | 78 [37–144] | 88 [43–165] | < 0.0001 | 88 [45–161] | 89 [45–163] | 0.891 |
Diabetes mellitus, % | 54.3 | 48.2 | < 0.0001 | 49.5 | 48.1 | 0.261 |
Comorbid CVD, % | 31.8 | 29.1 | 0.0002 | 33.3 | 31.6 | 0.818 |
Systolic BP, mmHg | 152 ± 24 | 152 ± 24 | 0.537 | 152 ± 23 | 152 ± 24 | 0.402 |
Diastolic BP, mmHg | 79 ± 15 | 81 ± 15 | < 0.0001 | 81 ± 15 | 81 ± 15 | 0.268 |
Heart rate, bpm | 75 ± 13 | 76 ± 13 | < 0.0001 | 77 ± 13 | 77 ± 13 | 0.616 |
BMI, kg/m2 | 22.4 ± 4.2 | 22.8 ± 4.2 | < 0.0001 | 22.8 ± 4.2 | 22.8 ± 4.1 | 0.729 |
Serum UN, mg/dL | 61.4 ± 15.4 | 61.5 ± 14.5 | 0.573 | 61.7 ± 14.5 | 61.6 ± 14.3 | 0.746 |
Creatinine, mg/dL | 10.5 ± 2.7 | 11.0 ± 2.6 | < 0.0001 | 10.9 ± 2.6 | 11.0 ± 2.5 | 0.483 |
β2MG, mg/L | 27.2 ± 6.3 | 27.6 ± 6.4 | 0.0009 | 27.5 ± 6.5 | 27.5 ± 6.2 | 0.904 |
Kt/V | 1.49 ± 0.30 | 1.52 ± 0.31 | < 0.0001 | 1.54 ± 0.31 | 1.54 ± 0.31 | 0.592 |
Serum albumin, g/dL | 3.6 ± 0.4 | 3.6 ± 0.4 | < 0.0001 | 3.6 ± 0.3 | 3.6 ± 0.3 | 0.190 |
Hemoglobin, g/dL | 11.0 ± 1.3 | 11.1 ± 1.3 | < 0.0001 | 11.1 ± 1.2 | 11.2 ± 1.2 | 0.589 |
CRP, mg/dL | 0.14 [0.05–0.42] | 0.14 [0.06–0.39] | 0.0008 | 0.14 [0.05–040] | 0.14 [0.06–0.38] | 0.784 |
