Patient Characteristics (n = 56).
| Male-female ratio | 24:32 |
|---|---|
| Patient age (range) | 44 years (27-64) |
| Diagonosis Number patients with stenosis Number patients with spondylolisthesis |
48 8 |
| Lumbar level L3-L4 L4-L5 L5-S1 |
5 47 4 |
| Number of levels treated One level Two levels |
52 4 |
| Mean operative time (range) per level | 8 minutes (5-20) |
| Number patients with complications | None |
| Number patients with failed of treatment | 3 |
| Follow-up | 2 years |