Table 1.
Patients’ demographics
| Patient | Gender | Age | Time between surgeries (months) | Previous surgery | Level of surgery | Spondylolisthesis level | Grade |
|---|---|---|---|---|---|---|---|
| 1 | M | 57 | 12 | Decompression | L4/5 | L4 | 2 |
| Discectomy | L4 | ||||||
| 2 | F | 58 | 144 | Decompression | L4/5, L5/S1 | L4 | 2 |
| Instrumented Fusion | L5/S1 | ||||||
| 3 | F | 71 | 17 | Decompression | L4/5 | L4 | 1 |
| Non-instrumented Fusion | L5/S1 | ||||||
| 4 | F | 61 | 16 | Decompression | L3/4, L4/5 | L5 | 1 |
| Discectomy | L4 | ||||||
| 5 | F | 68 | 96 | Decompression | L3/4, L4/5 | L4 | 1 |
| 6 | M | 52 | 124 | Decompression | L5/S1 | L5 | 2 |
| Discectomy | L5 |
Spondylolisthesis grade according to the Meyerding classification [21]