Skip to main content

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