Table 2 Diagnostic utility of the different cut-offs
Cut-off of subjective improvement | Pilot phase | Validation phase | ||
|---|---|---|---|---|
Sensitivitya | Specificity | Sensitivity | Specificity | |
20% | 93.3% | 37.5% | 79.2% | 41.7% |
30% | 80.0% | 66.7% | 76.6% | 58.3% |
40% | 73.3% | 73.3% | 66.0% | 81.3% |
50% | 60.0% | 80.0% | 57.5% | 91.7% |