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The clinical and radiological features
| Clinical features | Number of patients |
|---|---|
| Back pain | 44 |
| Radicular pain | 44 |
| Motor/sensory deficit | 6 |
| Duration of symptoms before surgery | 4 weeks-6 months (mean-64 days) |
| Radiological level involved | |
| L3-L4 | 5 |
| L4-L5 | 24 |
| L5-S1 | 15 |
| Number of levels fixed | |
| Single level | 18 |
| Two levels | 23 |
| Three levels | 3 |
