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Interpret Your Red Cell Distribution Width Results
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Red Cell Distribution Width Normal Ranges
RDW measures the variability in red blood cell size (anisocytosis).
| Reference Range | Unit | Notes |
|---|---|---|
| 11.5 – 14.5 | % | RDW-CV (coefficient of variation) |
Common Causes of High RDW
Iron deficiency anemia (most common cause)Vitamin B12 deficiencyFolate deficiency
Common Causes of Low RDW
Not clinically significant (low RDW means cells are uniformly sized)
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