d -dimer assay in the diagnosis of symptomatic deep venous thrombosis (DVT)
| Patients | DVT | Sensitivity | Specificity | +LR | −LR |
|---|---|---|---|---|---|
| *LRs defined in glossary and calculated from data in article. | |||||
| All | Proximal | 100% | 76% | 4.2 | 0.0 |
| All | Isolated calf | 82% | 69% | 2.7 | 0.3 |
| All | All | 91% | 82% | 5.1 | 0.1 |
| High risk | All | 100% | 47% | 1.9 | 0.0 |
| Moderate risk | All | 75% | 78% | 3.4 | 0.3 |
| Low risk | All | 75% | 90% | 7.5 | 0.3 |