Table 1.
Characteristic of the study population
| <65 years (n = 31) | ≥65 years (n = 56) | Healthy volunteers (n = 20) | |
|---|---|---|---|
| Age, years | 57.5 ± 4.2 | 77.5 ± 6.8*** | 51.6 ± 8.8 |
| eGFR, ml/min/1.73 m2 | 70.8 ± 17.4 | 60.1 ± 19.2** | 98.2 ± 15.6### |
| GDF-15 (pg/ml) | 679.2 (546.9–956.9) | 1451.8 (1055.5–2499.4)** | 695.0 (515.8–927.5) |
| Fe (μg/dl) | 79.9 ± 32.9 | 71.2 ± 38 | 95.9 ± 25.7 |
| TSAT (%) | 27.6 ± 10.8 | 27.6 ± 14.6 | 29.0 ± 7.1 |
| Ferritin | 160.8 (72.4–227.6) | 140.9 (91.6–251.8) | 108.9 (61.2–159.1)# |
| Hb (g/dl) | 13.2 ± 2 | 13 ± 2.2 | 14.0 ± 1.0 |
| hsCRP (mg/l) | 3.8 (1.4–16.2) | 8.1 (3.8–24.5)* | 0.1 (0.1–0.31)### |
| IL-6 (pg/ml) | 0.8 (0.2–5) | 2.8 (0.5–6.8) | 0.1 (0.01–0.35)### |
| sTfR (nmol/l) | 17.8 (13.7–25) | 18.5 (16.6–23.6) | 21.2 (15.5–28.3) |
| Hepcidin (ng/ml) | 33.5 (14.2–61.9) | 36.2 (28.2–42.3) | 23.3 (19.1–31.8)# |
* P < 0.05, ** P < 0.01, *** P < 0.001, CKD patients <65 versus >65 years old
# P < 0.05, ### P < 0.001 healthy volunteers versus CKD patients <65 years