Comparison of interobserver variability (κ) of the OKM grading scale and other angiographic grading scales
| Scale | Parameters | κ | Reference |
|---|---|---|---|
| Aneurysms | 12 Possibilities | 0.74 | This article |
| Flow-diversion stents | Filling grade: A, B, C, D | ||
| OKM scale | Stasis grades: 1, 2, 3 | ||
| Aneurysms | 4 Possibilities | 0.50 | Cloft et al, 20078 |
| Coiled | Complete, dog-ear, residual neck, residual aneurysm | ||
| 4-Point Raymond scale | |||
| Aneurysms | 3 possibilities | 0.54 | Cloft et al, 20078 |
| Coiled | Complete, near-complete, incomplete | ||
| 3-Point scale | |||
| AVMs | 7 Possibilities | 0.47 | Al-Shahi et al, 20029 |
| Spetzler-Martin scale | Nidus size: 1, 2, 3; | ||
| eloquence: 0, 1; | 0.70 | Iancu-Gontard et al, 200710 | |
| venous drainage: 0, 1 |