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Table 2 Estimates of diagnostic accuracy with 95% confidence intervals for the D-dimer and calf difference tests obtained in the full study population

From: Advantages of the nested case-control design in diagnostic research

Measures of diagnostic
accuracy
D-dimer test
(dichotomous)
Calf difference test
(continuous per cm)
Sensitivity 0.94 (0.91 – 0.97) -
Specificity 0.38 (0.35 – 0.41) -
PPV 0.30 (0.27 – 0.33) -
NPV 0.96 (0.94 – 0.98) -
Odds Ratio 9.33 (5.70 – 15.3) 1.44 (1.33 – 1.56)
ROC area - 0.69 (0.65 – 0.72)
  1. - = not applicable; PPV = positive predictive value; NPV = negative predictive value ROC area = area under the receiver operating characteristic curve