Author(s) (year) | Design | No of patients | Outcome assessment | Findings |
Zdeblick (1993)21 | Prospective randomised | 124 | Scale of excellent, good, fair and poor |
|
Fritzell (2002)22 | Prospective randomised | 294 | Oswestry Disability Score, general function score, visual assessment score |
|
Fischgrund (1997)23 | Prospective randomised | 76 | Scale of excellent, good and poor |
|