| Variable | Preoperative | Postoperative | χ2 | p | ||
| No. | % | No. | % | |||
| Leg pain | 42.8 | <0.001 | ||||
| No | 0 | - | 25 | 100.0 | ||
| Yes | 30 | 85.7 | 5 | 14.3 | ||
| Leg parasthesia | 58.3 | <0.001 | ||||
| No | 0 | - | 30 | 100.0 | ||
| Yes | 30 | 100.0 | 0 | - | ||
| Back pain | 13.4 | <0.001 | ||||
| No | 0 | - | 11 | 100.0 | ||
| Yes | 30 | 61.2 | 19 | 38.8 | ||