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Demographic data of patients.
| Number of patients | 37 |
| Age (years) | 79 (75–86) |
| Sex (male/female) | 22/15 |
| Mean follow-up (months) | 78 (0–140) |
| JOA score | |
| Preoperative∗ | 9.3 (4–14) |
| Postoperative∗ | 10.9 (4–15) |
| Recovery rate∗ | 21% (−67 to 78) |
∗Six months after surgery, excluding one patient who died 2 weeks after surgery.
