Male and Female (1-5 yrs) 2.5 - 6.0 mg/L
Male and Female (5 - 15 yrs) 2.2 - 5.5 mg/L
Males (16 to 99 yrs) 2.2-5.0 mg/L
Females (16-99yrs) 1.9-4.4 mg/L
Elevated levels of sTFR are noted in patients with iron deficiency, even with concurrent inflammation. They can also be seen in conditions with increased red cell formation/ turnover. Some examples are haemolytic conditions, recent blood loss, erythropoiesis stimulating agents, myelodysplasia or inerited red cell disorders such as G6PD-deficiency or hereditary spherocytosis.