Prognostic Performance of Test
| Test result | Disease (no response to chemotherapy) | No disease (positive response to chemotherapy) | Total |
|---|---|---|---|
| Positive | 15 | 3 | 18 |
| Negative | — | 12 | 12 |
| Total | 15 | 15 | 30 |
Sensitivity = 100% (95% confidence interval = 0.78–1.0); specificity = 80% (95% confidence interval = 0.52–0.95); positive predictive value = 83%; negative predictive value = 100%; likelihood ratio = 5.