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Table 4 Sensitivity, specificity, positive predictive value and negative predictive value for different cutoff point

From: The association of Red cell distribution width and in-hospital mortality in older adults admitted to the emergency department

RDW Sensitivity (95 % CI) Specificity (95 % CI) PPV (95 % CI) NPV (95 % CI)
≥ 12.8 94.6 (86.7 – 98.5) 23.3 (21.4 – 25.2) 4.5 (3.6–5.7) 99.1 (97.7 – 99.8)
≥ 13.4 83.8 (73.4 – 91.3) 51.2 (48.9 – 53.4) 6.2 (4.8 – 7.9) 98.8 (97.9 – 99.4)
≥ 14.3 70.3 (58.5 – 80.3) 75.3 (73.3 – 77.2) 9.9 (7.5 – 12.8) 98.5 (97.7 – 99.1)
≥ 14.5a 67.6 (55.7 – 78.0) 79.0 (77.1 – 80.8) 11 (8.3 – 14.3) 98.4 (97.7 – 99.0)
  1. Abbreviation: RDW red cell distribution width, PPV positive predictive value, NPV negative predictive value, CI confidence interval
  2. abest cutoff value