Table 1.
Patient demographics and surgical data for patients operated for spinal stenosis and for degenerative spondylolisthesis
| Spinal stenosis | Degenerative spondylolisthesis | |||
|---|---|---|---|---|
| N | N | |||
| Age; Yr ± SD | 3858 | 66 ± 11 | 617 | 67 ± 10 |
| Female, no (%) | 3859 | 1919 (50%) | 617 | 444 (72%) |
| ASA level (1–4); Mean ± SD | 3759 | 2.0 ± 0.6 | 608 | 2.0 ± 0.5 |
| ASA level 1, no (%) | 681 (18%) | 82 (13%) | ||
| ASA level 2, no (%) | 2349 (61%) | 429 (71%) | ||
| ASA level 3, no (%) | 753 (19%) | 97 (16%) | ||
| ASA level 4, no (%) | 12(0.3%) | 0 | ||
| Body Mass Index; Mean (SD) | 3547 | 27 ± 4 | 560 | 27.0 ± 5 |
| Smokers, no (%) | 3808 | 877 (23%) | 609 | 115 (19%) |
| Laminectomy, no (%) | 3859 | 1024 (27%) | 617 | 239 (39%) |
| Midline preserving decompression, no (%) | 3859 | 2835 (73%) | 617 | 378 (61%) |
| Fusion, no (%) | 3859 | 214 (6%) | 617 | 297 (48%) |
| ODI; Mean (SD) | 3837 | 40 ± 15 | 617 | 41 ± 15 |
| EQ-5D; Mean (SD) | 3535 | 0.37 ± 0.32 | 564 | 0.34 ± 0.32 |
| NRS leg pain; Mean (SD) | 3559 | 6.6 ± 2.2 | 569 | 6.7 ± 2.2 |
| NRS back pain; Mean (SD) | 3597 | 6.4 ± 2.2 | 573 | 6.9 ± 2.1 |
N number of patient with data for the evaluated parameter