For adults, the normal range for RDW-CV is 11.6-14.6%. RDW-CV is determined by two parameters: RDW-SD (standard deviation) and MCV (mean corpuscular volume).
If you have normal RDW, low MCV, anemia may be indicated.
If you have elevated RDW, low MCV, sickle cell anemia and iron deficiencies may be indicated.
If you have normal RDW, high MCV, aplastic anemia or chronic liver disease may be indicated.
If you have elevated RDW, high MCV, immune hemolytic anemia, myelodysplastic syndrome, vitamin B12 deficiency may be indicated.
If you have elevated RDW, normal MCV, myelodysplastic syndrome, vitamin B12 deficiency, chronic liver disease, dimorphic anemia may be indicated.
If you have normal RDW, normal MCV, occasionally, it may also indicate a health problem. Diseases with these results include anemia caused by chronic disease and by renal disease.