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Descriptive characteristics of the sample
| Variable | Frequency (%) | |
|---|---|---|
| Sex | Male | 185 (56.2%) |
| Female | 144 (43.8%) | |
| Clinical outcome | Poor | 62 (18.8%) |
| Good | 267 (81.2%) | |
| Number of laminectomy levels (n) | ≤ 3 | 137 (41.6%) |
| > 3 | 192 (58.4%) | |
| Signal changes in MRI | No change in signal intensity | 77 (23.4%) |
| Signal change on T1- + T2-weighted images | 146(44.4%) | |
| Signal change on T2-weighted images | 106 (32.2%) | |
| Smoking | Yes | 95 (28.9%) |
| No | 231 (71.1%) | |
| Diabetes Mellitus | Yes | 100 (30.4%) |
| No | 229 (69.6%) | |
