Table 2.
Sensitivity, specificity, positive and negative predictive values, and accuracy of the mean (T mean ) and standard deviation (T SD ) of the brightness values that differentiate gastrointestinal stromal tumor (GIST) from non-GIST mesenchymal tumors in the stomach
| Predicting GIST | Sensitivity, % (95% CI) | Specificity, % (95% CI) | PPV, % (95% CI) | NPV, % (95% CI) | Accuracy, % (95% CI) |
|---|---|---|---|---|---|
| Tmean ≥ 65 |
86.0 (72.6-93.7) |
93.3 (66.0-99.7) |
97.7 (86.5-99.9) |
66.7 (66.7-43.1) |
87.7 (76.6-94.2) |
| TSD ≥ 75 |
90.0 (77.4-96.2) |
80.0 (51.4-94.7) |
93.8 (81.8-98.4) |
70.6 (44.0-88.6) |
87.7 (76.6-94.2) |
| Of the above 2 features |
|
|
|
|
|
| ≥ 1 |
94.0 (82.5-98.4) |
80.0 (51.4-94.7) |
94.0 (82.5-98.4) |
80.0 (51.4-94.7) |
90.8 (80.3-96.2) |
| Both | 82.0 (68.1-91.0) | 93.3 (66.0-99.7) | 97.6 (86.0-99.9) | 61.0 (38.8-79.5) | 84.6 (73.1-91.2) |
PPV positive predictive value, NPN negative predictive value, CI confidence interval.