Table 2.
Comparison of baseline characteristics between high and low RDW value
| High RDW (N = 42) | Low RDW (N = 94) | P | |
|---|---|---|---|
| Age (y) | 56.0 ± 12.0 | 53.0 ± 13.0 | 0.200 |
| Male | 26 (63) | 53 (56) | 0.261 |
| Duration of dialysis (mo) | 25.0 ± 20.0 | 34.0 ± 24.0 | 0.064 |
| Diabetes | 25 (61) | 44 (46) | 0.153 |
| Previous CV disease | 2 (4.8) | 5 (5.3) | 0.531 |
| Hemoglobin (g/dL) | 8.9 ± 1.6 | 9.1 ± 1.9 | 0.731 |
| Ferritin (ng/mL) | 418.0 ± 546.0 | 368.7 ± 330.5 | 0.632 |
| Iron (μg/dL) | 63.3 ± 27.3 | 68.4 ± 32.2 | 0.491 |
| TIBC (μg/dL) | 229.3 ± 54.3 | 211.3 ± 39.4 | 0.091 |
| Erythropoietin-stimulating agent | 39 (93) | 84 (88) | 0.230 |
| Total leukocyte count (×103/μL) | 7.5 ± 2.4 | 7.0 ± 2.4 | 0.231 |
| Platelet (103/μL) | 207.0 ± 85.0 | 188.0 ± 73.0 | 0.225 |
| C-reactive protein | 2.2 ± 3.6 | 1.1 ± 0.9 | 0.027 |
| Intact PTH (pg/mL) | 281.2 ± 255.1 | 337.2 ± 320.2 | 0.051 |
| Albumin (g/dL) | 3.1 ± 0.5 | 3.3 ± 0.5 | 0.050 |
| Na (mEq/L) | 138.7 ± 3.9 | 137.9 ± 3.5 | 0.271 |
| CO2 (mEq/L) | 21.8 ± 4.2 | 21.5 ± 5.7 | 0.832 |
| Echocardiographic data∗ | |||
| LA diameter (mm2) | 38.9 ± 13.2 | 42.6 ± 11.0 | 0.431 |
| LV ejection fraction | 54.5 ± 11.8 | 56.8 ± 10.4 | 0.041 |
| E/E′ ratio | 16.1 ± 7.2 | 13.0 ± 7.1 | 0.102 |
| Nonfatal cardiovascular event | 10 (25) | 8 (8) | 0.021 |
| Fatal cardiovascular event | 1 (2.43) | 2 (2.22) | 0.532 |
| Death | 10 (24.4) | 5 (5.6) | < 0.001 |
Data are presented as means ± SD or number (%).
CV, cardiovascular; LA, left atrium; LV, left ventricular; PTH, parathyroid hormone; RDW, red blood cell distribution width; TIBC, total iron-binding capacity.
∗
Echocardiographic data were available in 99 patients.