Table 1 Fusion levels and indications for fusion in groups A and B
|  |  | Group A (n = 22) | Group B (n = 30) |
|---|---|---|---|
Number of fusion levels |  | 1.1 ± 0.4 | 1.4 ± 0.5a |
Level of fusion | (No. of cases) | Â | Â |
One level | L3-L4 | 0 | 1 |
| Â | L4-L5 | 16 | 12 |
| Â | L5-S1 | 4 | 5 |
Two levels | L3-L4-L5 | 1 | 9 |
| Â | L4-L5-S1 | 1 | 3 |
Indications for fusion | Â | Â | Â |
Degenerative spondylolisthesis | 14 | 19 | |
Spondylolytic spondylolisthesis | 2 | 1 | |
Spinal canal stenosis | 6 | 10 | |