Table 1 Demographic characteristics
| Â | Â | Group I | Group II |
|---|---|---|---|
Number of patients | 33 | 50 | |
Age (Years) | Mean ± SD | 47 ± 9.4 | 50 ± 9.0 |
Gender | Male | 54% (18) | 36% (18) |
| Â | Female | 46% (15) | 64% (32) |
Height (Inches) | Mean ± SD | 66 ± 3.6 | 66 ± 3.5 |
Weight (Lbs) | Mean ± SD | 181 ± 42.4 | 174 ± 36.8 |
Duration of pain (years) | Mean ± SD | 12.4 ± 5.9 | 11.8 ± 6.5 |
Mode of onset of the pain | Traumatic | 39% (13) | 46% (23) |
| Â | Non-traumatic | 61% (20) | 54% (27) |
Back and lower extremity pain | 100% (33) | 100% (50) | |
Bilateral pain | 12% (4) | 12% (6) | |
History of previous surgery | 73% (24) | 84% (42) | |
Epidural fibrosis on MRI | 73% (24) | 84% (42) | |
Disc herniation on MRI | 12% (4) | 10% (5) | |