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Table 2 Comparison of clinical characteristics of the patients who were receiving haemodialysis according to median RBC age

From: Shortened red blood cell age in patients with end-stage renal disease who were receiving haemodialysis: a cross-sectional study

  Preserved RBC age
(n = 27)
Shortened RBC age
(n = 28)
p Value
Age (years) 72 (67–79) 71 (61–78) 0.32
Male sex 16 (59) 17 (61) 0.91
Body mass index (kg/m2) 21.3 (19.8–23.6) 21.3 (19.5–25.2) 0.89
Laboratory data
Haemoglobin (g/dL) 10.9 (10.6–11.4) 11.1 (10.3–11.9) 0.91
Haematocrit (%) 33 (31–35) 35 (33–37) 0.09
Albumin (g/dL) 3.6 (3.3–3.8) 3.5 (3.3–3.8) 0.97
High-sensitive CRP (mg/dL) 0.06 (0.04–0.43) 0.06 (0.04–0.26) 0.67
iPTH (pg/mL) 135 (98–182) 143 (104–197) 0.55
Transferrin saturation (%) 26 (19–39) 18 (14–26) < 0.01
Ferritin (ng/mL) 57 (36–122) 43 (20–65) 0.04
Reticulocyte (%) 1.7 (1.2–2.1) 1.7 (1.4–2.1) 0.72
Haptoglobin (mg/dL) 91 (61–139) 49 (25–114) < 0.01
Lactate dehydrogenase (U/L) 194 (176–207) 198 (177–214) 0.72
Iron supplement 5 (19) 13 (46) 0.03
Erythropoiesis-stimulating agent (μg/week) 20 (10–30) 33 (20–60) 0.004
Erythropoietin resistance index 5.0 (2.8–11.8) 11.4 (6.7–20.8) 0.01
Quantity of blood flow (mL/min) 220 (200–250) 200 (200–245) 0.53
Intradialytic ultrafiltration rate (mL/h/kg) 7.3 (6.0–9.3) 9.3 (7.0–12.7) 0.02
Dialysis membranes
Cellulose 11 (41) 9 (32) 0.51
Polysulfone 6 (22) 10 (36) 0.27
Polyethersulfone 8 (30) 7 (25) 0.70
Polymethylmethacrylate 1 (4) 0 (0) 0.23
Acrylonitrile-co-methallyl sulfonate 1 (4) 2 (7) 0.57
Heparin dosage (units/session) 2850 (2750–3825) 3205 (2800–3825) 0.52
  1. Data are presented as median (25th to 75th percentiles), or number (%)
  2. CRP C-reactive protein, iPTH intact parathyroid hormone, RBC red blood cell