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Table 2 Sensitivity, specificity, positive and negative predictive values of RDW in diagnosing iron deficiency anemia

From: Efficiency of red cell distribution width in identification of children aged 1-3 years with iron deficiency anemia against traditional hematological markers

Cut-offs (values in %) Sensitivity (%) Specificity (%) PPV (%) NPV (%)
RDW- 18% 76.5 73.1 73.21 76.4
RDW- 16.4% 94.2 50.7 64.74 90.1
RDW- 21% 28.5 95 84.56 58.03
Hb ≤10 g/dL and RDW >15% 99 90 90.49 98.9
  1. Abbreviations: RDW Red cell distribution width, Hb Hemoglobin, PPV Positive predictive value, NPV Negative predictive value.