Comparison of the pre- and postoperative grades of foraminal stenosis.
| Postoperative grade of foraminal stenosis | |||||
|---|---|---|---|---|---|
| Grade 0 | Grade 1 | Grade 2 | Grade 3 | ||
| Preoperative grade of Foraminal stenosis | Grade 1 (n=15) | 6 | 9 (60%) | - | - |
| Grade 2 (n=21) | 2 | 8 | 11 (52.4%) | - | |
| Grade 3 (n=8) | 0 | 0 | 3 | 5 (62.5%) | |