Table 3.
Continuous covariate distributions for subjects included in the analysis
| Study | Age (years) | BMI (kg/m2) | Weight (kg) | Haemoglobin (g/dL) | TSAT (%) | TIBC (µg/dL) | Ferritin (ng/mL) | Serum iron (µg/dL) | UIBC (µg/dL) | Haemodialysisa weight loss (kg) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A (n = 33) | Mean | 33.0 | 27.3 | 79.8 | 12.9 | 21.0 | 332 | 39.8 | 67.8 | 265 | 0 |
| SD | 7.53 | 5.56 | 15.9 | 1.24 | 7.60 | 45.3 | 31.8 | 20.9 | 54.7 | 0 | |
| Median | 31 | 27.0 | 79 | 12.8 | 21 | 327 | 24.5 | 65 | 262 | 0 | |
| Min | 20 | 17.7 | 46.5 | 11.1 | 7.4 | 249 | 4.4 | 30 | 149 | 0 | |
| Max | 58 | 40.8 | 115 | 15.6 | 40.2 | 429 | 109 | 107 | 380 | 0 | |
| B (n = 58) | Mean | 30.4 | 25.8 | 76.7 | 13.3 | 15.7 | 406 | 26.2 | 63.4 | 343 | 0 |
| SD | 8.0 | 2.7 | 12.7 | 1.2 | 6.6 | 43.9 | 19.5 | 26.3 | 50.3 | 0 | |
| Median | 30 | 26.2 | 79 | 13.5 | 15.5 | 402 | 20.5 | 61.5 | 339 | 0 | |
| Min | 18 | 19.9 | 49.4 | 10.7 | 3 | 317 | 7 | 16 | 232 | 0 | |
| Max | 45 | 30.0 | 102 | 15.9 | 31 | 503 | 88 | 127 | 452 | 0 | |
| C (n = 20) | Mean | 60.7 | 29.6 | 84.2 | 12.4 | 29.6 | 203 | 259 | 58.8 | 144 | 2.8 |
| SD | 11.8 | 4.29 | 14.5 | 1.01 | 9.68 | 40.1 | 154 | 19.8 | 41.0 | 1.01 | |
| Median | 64 | 29.1 | 83.9 | 12.4 | 26.5 | 206 | 215 | 55.5 | 140 | 2.65 | |
| Min | 34 | 21.5 | 55 | 10.7 | 14 | 128 | 86 | 32 | 91.5 | 1.1 | |
| Max | 77 | 37.9 | 107 | 14.6 | 47 | 275 | 677 | 99 | 222 | 4.8 |
BMI body mass index, TSAT transferrin saturation, TIBC total iron binding capacity, UIBC unsaturated iron binding capacity, calculated as the absolute difference between the TIBC and serum iron, SD standard deviation, min minimum, max maximum, CKD chronic kidney disease
aHaemodialysis weight loss only for CKD patients on haemodialysis, otherwise values were fixed to zero