Level of erythropoietin in senile anaemla as compared to iron deficiency anemia

To investigate the etiology of the age-related decrease in hemoglobin [Hb] concentration, serum erythropoietin [EPO], serum iron, total iron binding capacity, and serum ferritin levels in 100 elderly subjects aged 60-70 years were measured. EPO levels were determined by radioimmunoassay