RDW / MCV ratio

The RDW/MCV ratio improves differentiation between various types of anemia and blood disorders. A high ratio often indicates iron deficiency anemia or thalassemia trait, where cells vary greatly in size despite being small overall. A low ratio suggests macrocytic anemias (B12/folate deficiency) where cells are uniformly large. The ratio is particularly valuable for early iron deficiency detection before anemia develops, distinguishing iron deficiency from thalassemia, and monitoring treatment response.

It also helps identify mixed deficiencies (concurrent iron and B12 deficiency) that individual parameters might miss, guiding more targeted supplementation and treatment decisions.