| Open surgical |  | Minimally invasive |  |
---|---|---|---|---|
Fusion | Â | Fusion | Â | |
Change Category | 12 Mo | 24 Mo | 12 Mo | 24 Mo |
Improvement of at least 2 points | 69 (61.1%) | 29 (50.0%) | 80 (86.0%) | 31 (81.6%) |
Improvement of <2 points | 17 (15.0%) | 7 (12.1%) | 6 (6.5%) | 1 (2.6%) |
No change or worsening | 27 (23.9%) | 22 (37.9%) | 7 (7.5%) | 6 (15.8%) |
Improvement of at least 2.5 points or postoperative score <3.5 points | 66/114 (58%) | 27/58 (47%) | 81/94 (86%) | 31/38 (82%) |