Table 2.
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) |
- = not applicable; PPV = positive predictive value; NPV = negative predictive value ROC area = area under the receiver operating characteristic curve