Ability to predict response to treatment
| Cut off points | |||
|---|---|---|---|
| 1 | 2 | 3 | |
| Sensitivity (%) | 53 | 87 | 100 |
| Specificity (%) | 84 | 74 | 58 |
| Positive predictive value (%) | 73 | 72 | 65 |
| Negative predictive value (%) | 70 | 88 | 100 |
| Likelihood ratio for positive result | 3.31 | 3.35 | 2.38 |
| Pre-test probability (%) | 41 | 41 | 41 |
| Post-test probability (%) | 70 | 70 | 62 |