Table 4.
Average Diagnostic Performance of All Five Reviewers When Evaluating for Individual CT Imaging Features of TBI Patients
| Frequency (n = 50) | Sensitivity | Specificity | NPV | PPV | Accuracy | |
|---|---|---|---|---|---|---|
| Any abnormality | 41 (82.0%) | 95.8% | 76.0% | 81.6% | 94.6% | 92.4% |
| Skull fracture | 23 (46.0%) | 90.8% | 84.0% | 91.0% | 84.2% | 87.2% |
| EDH | 2 (4.0%) | 90.0% | 97.6% | 99.6% | 79.2% | 97.4% |
| SDH | 23 (46.0%) | 78.0% | 94.6% | 85.2% | 92.2% | 87.0% |
| SAH | 30 (60.0%) | 94.4% | 84.6% | 92.0% | 90.4% | 90.6% |
| IVH | 7 (14.0%) | 94.6% | 97.2% | 96.8% | 83.4% | 94.6% |
| Contusions | 17 (34.0%) | 65.6% | 90.6% | 85.6% | 77.0% | 82.6% |
| Parenchymal hematomas | 2 (4.0%) | 73.4% | 98.0% | 98.4% | 71.8% | 96.4% |
| TAI | 11 (22.0%) | 63.4% | 94.2% | 91.6% | 73.4% | 87.8% |
| Midline shift >5 mm | 18 (36.0%) | 90.0% | 89.4% | 94.0% | 84.6% | 89.8% |
| Effaced/absent basal cisterns | 21 (42.0%) | 92.6% | 90.2% | 93.8% | 89.4% | 91.2% |
EDH, epidural hemorrhage; SDH, subdural hemorrhage; SAH, subarachnoid hemorrhage; IVH, intraventricular hemorrhage; TAI, traumatic axonal injury; NPV, negative predictive value; PPV, positive predictive value; TBI, traumatic brain injury; CT, computed tomography.