Table 1.
Baseline characteristics of patients who initiated hemodialysis with a central vein catheter between July 1, 2010 and June 30, 2011 and had an arteriovenous fistula or graft surgery within 6 months
| Variable | All, % | AVF, n=7433 | AVG, n=2025 | P Value |
|---|---|---|---|---|
| Age at dialysis initiation, yr | 77±7 | 77±6 | 78±7 | <0.001 |
| 67 to <75 | 41 | 3127 (42) | 735 (36) | <0.001 |
| 75 to <85 | 45 | 3,311 (45) | 921 (46) | |
| ≥85 | 14 | 995 (13) | 369 (18) | |
| Sex | ||||
| Men | 52 | 4102 (55) | 825 (41) | <0.001 |
| Women | 48 | 3331 (45) | 1200 (59) | |
| Race | ||||
| White | 74 | 5660 (76) | 1324 (65) | <0.001 |
| Black | 21 | 1372 (19) | 605 (30) | |
| Other/unknown | 5 | 401 (5) | 96 (5) | |
| Body mass index, kg/m2 | 28±7 | 29±7 | 28±7 | <0.001 |
| Comorbidities | ||||
| Liu comorbidity index | 10±4 | 10±4 | 11±5 | <0.001 |
| 0–7 | 21 | 1619 (22) | 394 (20) | 0.01 |
| 7–13 | 43 | 3236 (44) | 861 (43) | |
| ≥13 | 35 | 2578 (35) | 768 (38) | |
| Diabetes, yes | 69 | 5123 (69) | 1406 (69) | 0.66 |
| Cancer, yes | 21 | 1534 (21) | 461 (23) | 0.04 |
| Chronic obstructive pulmonary disease, yes | 38 | 2779 (37) | 828 (41) | 0.004 |
| Peripheral vascular disease, yes | 56 | 4119 (55) | 1191 (59) | <0.01 |
| Depression, yes | 14 | 975 (13) | 356 (18) | <0.001 |
| Dementia, yes | 11 | 745 (10) | 276 (14) | <0.001 |
| Acute myocardial infarction in prior 1 yr, yes | 11 | 827 (11) | 235 (12) | 0.55 |
| Coronary revascularization, yes | 11 | 837 (11) | 187 (9) | <0.01 |
| History of stroke, yes | 19 | 1362 (18) | 467 (23) | <0.001 |
| Amputation, yes | 3 | 211 (3) | 67 (3) | 0.27 |
| Inability to ambulate//institutionalized/functional limitations, yes | 26 | 1758 (24) | 674 (33) | <0.001 |
| Hospital days, 6 mo before ESRD | 18±18 | 17±17 | 21±21 | <0.001 |
| GFR, mean±SD, ml/min per 1.73 m2 | 13±6 | 13±6 | 14±6 | <0.001 |
| Hemoglobin, mean±SD, g/dl | 10±3 | 10±3 | 10±3 | <0.001 |
| Serum albumin, g/dl | ||||
| Mean±SD | 3±0.9 | 3±0.8 | 3±1 | <0.001 |
| <3.5 | 71 | 3889 (70) | 1107 (75) | 0.001 |
| ≥3.5 | 29 | 1649 (30) | 380 (26) | |
| Dialysis initiation to VA surgery, d | 69±45 | 71±43 | 60±50 | <0.001 |
All values are n (%) or mean±SD unless otherwise indicated. P values by Pearson chi-squared or t test. Percentages of missing: body mass index (0.7%), hemoglobin (8%), serum albumin (26%), and GFR (3%). AVF, arteriovenous fistula; AVG, arteriovenous graft; VA, vascular access.