| Variable | No. | % |
| Leg pain | ||
| No | 25 | 83.3 |
| Yes | 5 | 16.7 |
| Leg parasthesia | ||
| No | 30 | 100.0 |
| Yes | 0 | - |
| Back pain | ||
| No | 11 | 36.7 |
| Yes | 19 | 63.3 |
| Infection | ||
| No | 30 | 100.0 |
| Yes | 0 | - |