|
Prevalence of DVT
|
PPV*
|
NPV*
|
Sensitivity
|
Specificity
|
DOR
|
Positive test result (%)
|
|---|
|
D-dimer test (dichotomous)
|
|
0.05
|
0.07
|
0.99
|
0.96
|
0.32
|
10.7
|
69
|
|
0.1
|
0.14
|
0.99
|
0.97
|
0.33
|
9.2
|
70
|
|
0.2
|
0.26
|
0.97
|
0.96
|
0.33
|
11.9
|
73
|
|
Calf-difference test (dichotomous)
|
|
0.05
|
0.09
|
0.98
|
0.69
|
0.65
|
4.0
|
37
|
|
0.1
|
0.17
|
0.95
|
0.68
|
0.64
|
3.1
|
39
|
|
0.2
|
0.32
|
0.89
|
0.67
|
0.65
|
3.8
|
41
|
- * Estimates of PPV and NPV obtained with the weighted formula, with Mercaldo’s approach and with weighted logistic regression were the same
- (PPV = positive predictive value; NPV = negative predictive value, DOR=Diagnostic Odds Ratio).
