Number of deaths, sensitivities and specificities according to a range of cut-off values of Ki67
| Ki67 | No. died (%) | No. in category | Sensitivity | Specificity | Youden's index (J) |
|---|---|---|---|---|---|
| ≥0 | 29 (15.0) | 193 | 1 | 0 | 0 |
| ≥5 | 28 (17.6) | 159 | 0.966 | 0.201 | 0.167 |
| ≥10 | 27 (22.0) | 123 | 0.931 | 0.415 | 0.346 |
| ≥15 | 20 (21.3) | 94 | 0.690 | 0.549 | 0.238 |
| ≥20 | 16 (22.5) | 71 | 0.552 | 0.665 | 0.216 |
| ≥30 | 12 (25.0) | 48 | 0.414 | 0.780 | 0.194 |
| ≥40 | 10 (27.8) | 36 | 0.345 | 0.841 | 0.186 |
| ≥50 | 8 (27.6) | 29 | 0.276 | 0.872 | 0.148 |
J=sensitivity+specificity−1.