Table 6.
Average Interobserver Agreement (Cohen's Kappa Coefficients) between All Readers in Comparison to the Interobserver Agreement between Only Neuroradiologists, Only Neurosurgeons, and Neuroradiologists and Neurosurgeons When Evaluating for Each CT Feature of TBI
| Frequency(n = 50) | All reviewers | Neuroradiology versus neuroradiology | Neurosurgery versus Neurosurgery | Neuroradiology versus Neurosurgery | |
|---|---|---|---|---|---|
| Any abnormality | 41 (82.0%) | 0.568 | 0.585 | 0.558 | 0.570 |
| Skull fracture | 23 (46.0%) | 0.590 | 0.547 | 0.630 | 0.577 |
| EDH | 2 (4.0%) | 0.577 | 0.791 | 0.431 | 0.615 |
| SDH | 23 (46.0%) | 0.531 | 0.733 | 0.419 | 0.554 |
| SAH | 30 (60.0%) | 0.669 | 0.496 | 0.712 | 0.676 |
| IVH | 7 (14.0%) | 0.683 | 0.571 | 0.623 | 0.731 |
| Contusions | 17 (34.0%) | 0.332 | 0.628 | 0.214 | 0.342 |
| Parenchymal hematomas | 2 (4.0%) | 0.400 | 0.298 | 0.470 | 0.383 |
| TAI | 11 (22.0%) | 0.423 | 0.418 | 0.302 | 0.484 |
| Midline shift >5 mm | 18 (36.0%) | 0.652 | 0.762 | 0.639 | 0.641 |
| Effaced/absent basal cisterns | 21 (42.0%) | 0.691 | 0.842 | 0.630 | 0.697 |
EDH, epidural hemorrhage; SDH, subdural hemorrhage; SAH, subarachnoid hemorrhage; IVH, intraventricular hemorrhage; TAI, traumatic axonal injury; TBI, traumatic brain injury; CT, computed tomography.