Table 2.
Patient characteristics by ultrafiltration rate group as of the first reporting month in 2012
| Characteristic | Patients included in the CMS Measure Denominator, n=148,950 | Patients included in the KCQA Measure Denominator, n=151,937 | ||
|---|---|---|---|---|
| ≤13 ml/h per kg, n=117,231 | >13 ml/h per kg, n=31,719 | <13 ml/h per kg, n=124,639 | ≥13 ml/h per kg, n=27,298 | |
| UF rate, ml/h per kg | ||||
| Mean±SD | 7.3±3.3 | 17.3±4.8 | 7.4±3.5 | 17.4±6.3 |
| Median [Q1, Q3] | 7.6 [5.0, 10.0] | 15.9 [14.2, 18.7] | 7.6 [5.3, 9.9] | 15.6 [14.1, 18.3] |
| Age, yr | 63±15 | 60±16 | 63±15 | 58.8±16.2 |
| Women | 51,935 (44.3) | 15,138 (47.7) | 55,232 (44.3) | 13,095 (48.0) |
| Black race | 44,273 (37.8) | 10,385 (32.8) | 46,398 (37.3) | 8907 (32.6) |
| Hispanic ethnicity | 18,993 (16.2) | 6793 (21.4) | 20,262 (16.3) | 6007 (22.0) |
| Median income, dollars | 47,716 [37,275, 61,992] | 47,788 [37,324, 61,629] | 47,716 [37,280, 61,985] | 47,895 [37,227, 61,629] |
| Time on dialysis, yr | ||||
| <1 | 37,214 (31.7) | 7427 (23.4) | 44,249 (35.5) | 6337 (23.2) |
| 1–5 | 53,192 (45.4) | 14,588 (46.0) | 53,326 (42.8) | 12,447 (45.6) |
| >5 | 26,825 (22.9) | 9704 (30.6) | 27,063 (21.7) | 8513 (31.2) |
| Access type | ||||
| Graft | 21,744 (18.6) | 6412 (20.2) | 21,421 (17.2) | 5536 (20.3) |
| Fistula | 66,671 (56.9) | 19,175 (60.5) | 66,101 (53.2) | 16,047 (58.9) |
| Catheter | 28,678 (24.5) | 6100 (19.3) | 36,827 (29.6) | 5672 (20.8) |
| Average pre–HD SBP, mmHg | 148±27 | 152±27 | 148±23 | 152±24 |
| Pre-HD SBP, mmHg | ||||
| <100 | 3086 (2.6) | 631 (2.0) | 1751 (1.4) | 294 (1.1) |
| 100–129 | 26,042 (22.3) | 5827 (18.4) | 24,302 (19.9) | 4405 (16.4) |
| 130–159 | 49,376 (42.2) | 12,971 (41.0) | 58,698 (48.0) | 12,310 (45.8) |
| ≥160 | 38,487 (32.9) | 12,209 (38.6) | 37,657 (30.8) | 9845 (36.7) |
| History of heart failure | 28,971 (24.7) | 9535 (30.1) | 29,129 (23.4) | 8482 (31.1) |
| History of diabetes | 50,224 (42.8) | 13,883 (43.8) | 50,796 (40.8) | 12,008 (44.0) |
| Post-HD weight, kg | 83.5±23.3 | 68.5±16.2 | 83.1±23.1 | 67.6±15.9 |
| BMI, kg/m2 | 28.8±7.6 | 24.3±5.2 | 28.7±7.5 | 24.0±5.1 |
| Prescribed TT <240 min | 79,249 (67.6) | 25,964 (81.9) | 84,099 (67.5) | 22,593 (82.8) |
| Delivered TT <240 min | 82,405 (70.3) | 26,977 (85.0) | 92,785 (74.4) | 24,325 (89.1) |
| IDWG, kg | 2.3±1.9 | 3.7±1.9 | 2.2±1.4 | 3.6±1.5 |
| UF volume, L | 2.2±1.2 | 3.9±1.4 | 2.2±1.2 | 3.8±1.5 |
| eKt/V | 1.6±0.3 | 1.7±0.3 | 1.6±0.3 | 1.7±0.3 |
Values are presented as means±SDs, medians [Q1, Q3], or numbers (percentages). Because patients entered and exited the cohort according to selection criteria application on a rolling monthly basis, the first reporting month varied across patients. The KCQA measure and the KCQA measure without TT restriction denominators reflect the same patient population. CMS, Centers for Medicare and Medicaid Services; KCQA, Kidney Care Quality Alliance; UF, ultrafiltration; Q1, quartile 1; Q3, quartile 3; HD, hemodialysis; SBP, systolic BP; BMI, body mass index; TT, treatment time; IDWG, interdialytic weight gain; eKt/V, equilibriated Kt/V.