Previous studies on the surgical results of patients with advanced cervical myelopathy.
| Study | Nurick grade | n | Mean follow-up (months) | Improvement rate (%)* | Ability to walk independently after surgery (%)** |
|---|---|---|---|---|---|
| Ebersold et al 199536 | 4 | 7 | 88.2 | 57.14 | 57.1 |
| Macdonald et al 199718 | 4 | 8 | 31.0 | 50.0 | 50.0 |
| 5 | 8 | 31.0 | 50.0 | 50.0 | |
| Matsunaga et al 200415 | 4 | 39 | 211.2 | - | - |
| 5 | 31 | 211.2 | 16.2 | - | |
| Rajshekhar and Kumar 200514 | 4 | 55 | 36.3 | 68.5 | 68.5 |
| 5 | 17 | 36.3 | 100.0 | 47.0 | |
| Scardino et al 20107 | 5 | 9 | 53.4 | 66.6 | 22.2 |
| Current study | 4 | 21 | 26.0 | 85.7 | 85.7 |
| 5 | 22 | 32.0 | 63.6 | 36.3 |