Table 1.
Overall patients’ demographics (n=24)
| Variable | Value |
|---|---|
| Age (yr) | 63.83 ± 13.23 |
| Sex, male:female | 10:14 |
| Symptom duration (wk) | 15.25 ± 22.84 |
| Preoperative JOA | 6.67 ± 1.73* |
| Postoperative JOA | 8.63 ± 1.81* |
| Follow-up period (mo) | 29.7 ± 15.15 |
| JOA recovery rate (%) | 50.45 ± 24.37 |
| OLF type | |
| Lateral | 4 (16.7) |
| Extended | 13 (54.2) |
| Fused | 7 (29.2) |
| Tuberous | 0 (0) |
| Presence of HSI | 21 (87.5) |
Values are presented as mean±standard deviation or number (%).
JOA, Japanese Orthopaedics Association; OLF, ossification of ligamentum flavum; HSI, high signal intensity.
*
Statistical significant difference between preoperative JOA and postoperative JOA by Wilcoxon signed rank test (p<0.001).