Iron marker | Mean (SD) | Normal levels | Proportion iron deficient (%) |
Ferritin (μg/l) | 729.2 (1528.1) | 30–300 | 12.7 |
sTfR (μg/ml) | 17.4 (15.8) | <8.3 | 73.2 |
TfR-F index | 12.9 (28.1) | <5.6 | 46.4 |
Serum iron (μmol/l) | 16.0 (15.7) | 3.6–27.0 | 19.8 |
Serum transferrin (g/l) | 2.2 (0.7) | 2.0–3.6 | 2.5 |
Transferrin saturation (%) | 41.4 (39.7) | >16 | 37.4 |
TIBC (μmol/l) | 41.5 (12.7) | <72 | 1.0 |
MCHC (g/dl) | 32.9 (7.8) | 32.0–36.8 | 43.3 |
MCV (fl) | |||
<2 years | 106.3 (81.4) | 67–91 | 12.1 |
⩾2 years | 117.7 (88.1) | 73–89 | 21.5 |
MCHC, mean cell haemoglobin concentration; MCV, mean cell volume; sTfR, soluble transferrin receptor; TfR-F index, transferrin-ferritin index; TIBC, total iron binding capacity.