Diagnostic Performance of the Wells Rule Score and the Gestalt Probability Without Point-of-Care d-Dimer Test
| Performance Measure | Wells Rule Score ≤4 | Gestalt Probability <20% |
|---|---|---|
| Sensitivity | 52/73 (71.2) | 66/73 (90.4) |
| Specificity | 401/525 (76.4) | 189/525 (36.0) |
| Efficiency | 422/598 (70.6) | 196/598 (32.8) |
| Failure rate | 21/422 (5.0) | 7/196 (3.6) |
Note: Values are numerator/denominator (%).