| n | |
| Total Patients | 87 |
| Mean Age at Surgery (Years) | 57 |
| Mean BMI | 31 |
| Tobacco Use | 28 |
| Previous Lumbar Surgery | |
| Decompression Only at ASA Level | 3 |
| Pseudarthrosis at ASA Level | 8 |
| Recurrent Stenosis at ASA Level | 4 |
| Adjacent Level Fusion | 16 |