Table 3 Diagnostic efficacy of the developed radiomic nomogram in assessment of high Ki67 expression of gastrointestinal stromal tumors
| Â | Development cohort (%) | Internal validation cohort (%) | External validation cohort (%) |
|---|---|---|---|
Accuracy | 75.00 | 68.29 | 73.33 |
Sensitivity | 75.00 | 83.33 | 58.82 |
Specificity | 75.00 | 62.07 | 77.59 |
PPV | 59.02 | 90.00 | 86.54 |
NPV | 86.21 | 52.38 | 56.52 |