| ODI Category | Pre op N (%) | Discharge N (%) | 6 weeks post op N (%) | 12 weeks post op N (%) | P-value |
| Minimal disability (0% - 20%) | 0 (0) | 4 (10.3) | 19 (50.0) | 27 (73.0) | 0.000 |
| Moderate disability (21% - 40%) | 2 (5.1) | 22 (56.4) | 16 (42.1) | 8 (21.6) |
|
| Severe disability (41% - 60%) | 23(59.0) | 12 (30.8) | 3 (7.9) | 2 (5.4) |
|
| Crippled (61% - 80%) | 9 (23.1) | 1(2.6) | 0 (0) | 0 (0) |
|
| Bed bound or exaggerating symptoms (81% - 100%) | 5 (12.8) | 0 (0) | 0 (0) | 0 (0) |
|
| Total number of patients | 39 (100) | 39 (100) | 38 (100) | 37 (100) |
|
| Mean ODI | 62.35 ± 13.56 | 34 ± 11.79 | 24 ± 10.75 | 18.12 ± 10.61 |
|