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Frankel grade during follow-up
| Frankel grade | Preoperative | Postoperative (1 month) | Postoperative (6 months)a |
|---|---|---|---|
| E | 2 | 3 | 3 |
| D | 8 | 12 | 16 |
| C | 13 | 10 | 6 |
| B | 4 | 4 | 3 |
| A | 2 | 0 | 0 |
aThis patient died 1 month after surgery due to postoperative cerebrospinal fluid infection
