Table 1.
Baseline characteristics (demographics, history, clinical and laboratory parameters) of patients on hemodialysis, divided according to red blood cell distribution width (RDW) (median)
| Variable | RDW≤15.75 (n = 50) | RDW>15.75 (n = 50) | P* |
|---|---|---|---|
| Age (years), mean±SD† |
66.4 ± 14.2 |
67.7 ± 14 |
0.484 |
| Male sex, N |
23 |
29 |
0.926 |
| Body mass index (kg/m2), mean±SD |
25.9 ± 4.8 |
25.5 ± 5.3 |
0.539 |
| History of arterial hypertension, N |
41 |
44 |
0.416 |
| History of diabetes mellitus, N |
14 |
21 |
0.148 |
| History of coronary artery disease, N |
14 |
10 |
0.3595 |
| History of stroke/ transitory ischemic attack, N |
1 |
7 |
0.037 |
| Erythropoietin therapy, N |
46 |
44 |
0.525 |
| Duration of dialysis (months), median (range) |
36
(6-180) |
29
(6-360) |
0.390 |
| Kt/V, mean±SD |
1.37 ± 0.21 |
1.3 ± 0.24 |
0.068 |
| Eastern Cooperative Oncology Group performance status, median (range) |
2
(1-4) |
2.5
(1-4) |
0.105 |
| Atrial fibrillation, N |
7 |
14 |
0.093 |
| Carotid intima-media thickness (mm), mean±SD |
0.65 ± 0.17 |
0.71 ± 0.20 |
0.148 |
| ACE/AT II blockers at presentation, N |
18 |
20 |
0.685 |
| Beta-blocker at presentation, N |
17 |
19 |
0.681 |
| Calcium-blocker at presentation, N |
23 |
32 |
0.074 |
| Statins at presentation, N |
12 |
17 |
0.279 |
| Proton pump inhibitor at presentation, N |
12 |
19 |
0.137 |
| White blood cells (cells ×109/L), mean±SD |
7.02 ± 2.04 |
7.08 ± 1.93 |
0.796 |
| Hemoglobin (g/L), mean±SD |
114 ± 15 |
109 ± 17 |
0.196 |
| Mean corpuscular volume (fL), mean±SD |
96 ± 4 |
96 ± 6 |
0.890 |
| Creatinin (mmol/L), mean±SD |
825 ± 196 |
809 ± 254 |
0.590 |
| hs-C-reactive protein (mg/L), median (range) |
5.725 (0.6-92.9) |
7.850 (0.4-154.2) |
0.125 |
| nt-pro-brain natriuretic peptide (pg/mL), median (range) |
4671
(413-35000) |
6633
(466-35000) |
0.131 |
| Serum albumin (g/L), mean±SD |
38 ± 3 |
36 ± 4 |
0.147 |
| Total cholesterol (mmol/L), mean±SD |
4.33 ± 1.01 |
4.45 ± 1.34 |
0.920 |
| Iron (µmol/L), mean±SD |
12.6 ± 4.5 |
11.6 ± 5.1 |
0.359 |
| Total iron binding capacity (µmol/L), mean±SD |
35.1 ± 5.6 |
34.8 ± 7.9 |
0.793 |
| Eosinophilic cationic protein (µg/L), mean±SD | 15.69 ± 10.06 | 18.33 ± 17.26 | 0.912 |
*Mann-Whitney test was predominately used, except for calculation of difference in sex, wher χ2 test was used. P < 0.05 is considered as significant.
†SD – standard deviation.