Table 2.
Baseline characteristics of patients who initiated HD in 2005 through 2006 in the USRDS database by initial vascular access
| Variable | AVF(n = 17,110) | Non-AVF(n = 112,387) | P |
|---|---|---|---|
| Age (mean ± SD) | 63.2 ± 14.6 | 63.4 ± 15.6 | 0.129 |
| Age groups (n [%]) | <0.001 | ||
| ≤24.9 | 138 (0.8) | 1573 (1.4) | |
| 25.0 to 34.9 | 584 (3.4) | 4435 (3.9) | |
| 35.0 to 44.9 | 1324 (7.7) | 8972 (8.0) | |
| 45.0 to 54.9 | 2699 (15.8) | 17,145 (15.3) | |
| 55.0 to 64.9 | 4034 (23.6) | 24,200 (21.5) | |
| 65.0 to 74.9 | 4235 (24.8) | 26,011 (23.1) | |
| ≥75.0 | 4096 (23.9) | 30,051 (26.7) | |
| Male gender (n [%]) | 11,244 (65.7) | 60,764 (54.1) | <0.001 |
| Race (n [%]) | |||
| black | 4353 (25.4) | 33,381 (29.7) | <0.001 |
| Asian | 641 (3.7) | 3141 (2.8) | <0.001 |
| Hispanic | 1990 (11.6) | 15,096 (13.4) | <0.001 |
| white | 11,718 (68.5) | 73,242 (65.2) | <0.001 |
| BMI (mean ± SD) | 28.5 ± 7.2 | 28.4 ± 7.7 | 0.006 |
| BMI groups (n [%]) | <0.001 | ||
| ≤18.49 | 525 (3.1) | 4922 (4.4) | |
| 18.50 to 24.99 | 5450 (32.3) | 37,536 (33.9) | |
| 25.00 to 30.00 | 5086 (30.2) | 31,121 (28.1) | |
| ≥30.01 | 5803 (34.4) | 37,075 (33.5) | |
| Comorbid conditions (n [%]) | |||
| diabetes | 8653 (50.6) | 58,411 (52.0) | 0.001 |
| hypertension | 14,928 (87.2) | 92,867 (82.6) | <0.001 |
| coronary artery disease | 3884 (22.7) | 25,535 (22.7) | 0.960 |
| congestive heart failure | 4620 (27.0) | 40,502 (36.0) | <0.001 |
| peripheral vascular disease | 3498 (20.4) | 25,483 (22.7) | <0.001 |
| COPD | 1274 (7.4) | 10,595 (9.4) | <0.001 |
| cancer | 1126 (6.6) | 8755 (7.8) | <0.001 |
| tobacco use | 1068 (6.2) | 7044 (6.3) | 0.918 |
| nonambulatory | 519 (3.0) | 8836 (7.9) | <0.001 |
| ESRD cause (n [%]) | |||
| diabetes | 7740 (45.2) | 49,985 (44.5) | 0.063 |
| hypertension | 4315 (25.2) | 28,130 (25.0) | 0.596 |
| glomerulonephritis | 1624 (9.5) | 7128 (6.3) | <0.001 |
| PKD | 788 (4.6) | 1613 (1.4) | <0.001 |
| ARF nonrecovery | 50 (0.3) | 3424 (3.0) | <0.001 |
| other | 2593 (15.2) | 22,107 (19.7) | <0.001 |
| Predialysis nephrology care (11.2% missing; n [%]) | 15,459 (94.6) | 59,086 (59.9) | <0.001 |
| Insurance (n [%]) | |||
| Medicare | 10,143 (59.3) | 64,963 (57.8) | <0.001 |
| Medicaid | 3940 (23.0) | 30,343 (27.0) | <0.001 |
| DVA/DoD | 684 (4.0) | 2518 (2.2) | <0.001 |
| employer group | 5206 (30.4) | 28,112 (25.0) | <0.001 |
| other | 4299 (25.1) | 25,701 (22.9) | <0.001 |
| none | 732 (4.3) | 8894 (7.9) | <0.001 |
| Employment status (n [%]) | |||
| unemployed | 2808 (16.4) | 24,221 (21.6) | <0.001 |
| employed | 2357 (13.8) | 10,425 (9.3) | <0.001 |
| retired | 7068 (41.3) | 44,895 (39.9) | 0.001 |
| disabled | 3843 (22.5) | 23,482 (20.9) | <0.001 |
| medical leave | 344 (2.0) | 3830 (3.4) | <0.001 |
Data are based on CMS Form 2728 (Medical Evidence). ARF, acute renal failure; BMI, body mass index; COPD, chronic obstructive pulmonary disease; PKD, polycystic kidney disease.