Table 4.
Performance characteristics of the Wells score, Geneva score, Well's score + IMA and Geneva score + IMA using the cutoff point of pretest probability, based on s-CTPA as reference standard.
| Score/IMA | Sensitivity (95% Cl) | Specificity (95% Cl) | PPV (95% Cl) | NPV (95% Cl) |
| IMA (cutoff 0.25 ABSU) | 93.1 | 52.2 | 79.4 | 78.6 |
| D-dimer (cutoff 0.81 μg/ml) | 98.9 | 11.6 | 69.4 | 83.3 |
| Wells score (cutoff 2 point) | 79.3 | 48.8 | 75.8 | 53.8 |
| Geneva score (cutoff 5 point) | 73.6 | 51.2 | 75.3 | 48.9 |
| Wells score and IMA | 97.7 | 23.3 | 72.0 | 83.3 |
| Geneva score and IMA | 97.7 | 20.9 | 71.4 | 81.8 |
| Wells score and D-dimer | 100.0 | 2.3 | 67.4 | 100.0 |
| Geneva score and D-dimer | 100.0 | 4.7 | 68.0 | 100.0 |