RDW measures how much your red blood cells vary in size. It helps distinguish between types of anemia.
Category: Complete Blood Count
Also known as: rdw, red cell distribution width, rdw-cv
Reference range: 11.5–14.5 % (Source: ABIM)
Standard unit: %
High values may indicate
High RDW (anisocytosis) may indicate iron deficiency, vitamin B12 or folate deficiency, mixed anemias, or recent blood transfusion.
Low values may indicate
Low RDW is generally normal and indicates uniform red blood cell size.
Source: MedlinePlus, U.S. National Library of Medicine
Track your RDW over time with BloodId