Table 1 Patient characteristics at baseline (N = 85,117)
From: Real-world effectiveness of hemodialysis modalities: a retrospective cohort study
Characteristic | HD (N = 46,801) | HDF (N = 38,316) |
|---|---|---|
Age, yr, median (IQR) | 66 (55–75) | 64 (52–73) |
Gender, n (%) | ||
Female | 18,911 (40) | 15,312 (40) |
Male | 27,890 (60) | 23,004 (60) |
Ethnicity, n (%) | ||
Caucasian | 27,653 (59) | 21,574 (56) |
Other | 1157 (2) | 4192 (11) |
Unknown | 17,991 (38) | 12,550 (33) |
Smoking status, n (%) | ||
Nonsmoker | 20,123 (43) | 19,172 (50) |
Current/past smoker | 10,454 (22) | 8187 (21) |
Unknown | 16,224 (35) | 10,957 (29) |
Kidney failure etiology, n (%) | ||
Diabetes mellitus | 7262 (16) | 4661 (12) |
Hypertension | 5070 (11) | 4196 (11) |
Glomerulonephritis | 5140 (11) | 6639 (17) |
Other causes | 7368 (16) | 7629 (20) |
Unknown | 21,961 (47) | 15,191 (40) |
Charlson Comorbidity Index, mean ± SD | 3.7 ± 1.8 | 3.9 ± 1.9 |
Preexisting diabetes, n (%) | 16,547 (36) | 11,398 (30) |
Preexisting cardiovascular disease, n (%) | 34,123 (73) | 29,589 (77) |
Vascular access, n (%) | ||
Fistula | 21,842 (47) | 25,599 (67) |
Graft | 553 (1) | 1198 (3) |
Catheter | 23,558 (50) | 10,727 (28) |
Other | 848 (2) | 792 (2) |
Vintage | ||
Mean vintage in years (IQR) | 2.6 ± 4.6 | 4.4 ± 5.3 |
Incident patients (vintage < 90 days), n (%) | 24,085 (51) | 8876 (23) |
Prevalent patients (vintage ≥ 90 days), n (%) | 22,716 (49) | 29,440 (77) |
Body mass index (kg/m2) | ||
Missing, n (%) | 519 (1) | 312 (1) |
Mean ± SD | 27.7 ± 6.3 | 27.8 ± 6.2 |
Systolic blood pressure (mm Hg) | ||
Missing, n (%) | 8 (0.02) | 1 (0.00) |
Mean ± SD | 143 ± 23 | 145 ± 22 |
Diastolic blood pressure (mm Hg) | ||
Missing, n (%) | 6 (0.01) | 1 (0.00) |
Mean ± SD | 74 ± 14 | 73 ± 14 |
Prescribed dialysis frequency (days/week) | ||
Missing, n (%) | 3 (0.01) | 1 (0.00) |
Mean ± SD | 3.0 ± 0.4 | 3.0 ± 0.2 |
Duration of session (min) | ||
Median (IQR) | 240 (182–243) | 242 (240–245) |
Blood flow (mL/min) | ||
Missing, n (%) | 185 (0.4) | 82 (0.2) |
Median (IQR) | 304 (248–349) | 342 (294–379) |
OCM Kt/V | ||
Missing, n (%) | 13,399 (29) | 3518 (9) |
Mean ± SD | 1.4 ± 0.4 | 1.6 ± 0.4 |
Heart rate before dialysis (beats/min) | ||
Missing, n (%) | 6 (0.01) | 2 (0.01) |
Mean ± SD | 75 ± 11 | 74 ± 11 |