(a).
| Clinical scores | pre-OP | 1 M | 1 Y |
|---|---|---|---|
| JOA score | 19 | 23 | 25 |
| VAS of lumbar pain | 69 | 46 | 12 |
| VAS of leg pain | 51 | 37 | 20 |
| ODI | 33.3 | - | 17.8 |
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