Table 1 Patient population
Preservation group | Deterioration group | p value | |
|---|---|---|---|
No. of patients | 34 | 26 | |
Age (years) | 62.5 ± 8.8 | 67.8 ± 6.9 | 0.015* |
Male/female | 11/23 | 15/11 | 0.068 |
Clinical classification | 0.283 | ||
Radicular type | 25 | 14 | |
Cauda equina type | 5 | 7 | |
Mixed type | 4 | 5 | |
Intermittent claudication | 0.005* | ||
Severe (≤ 100 m) | 5 | 13 | |
Mild (> 100 m) | 29 | 13 | |
Muscle weakness | 0.029* | ||
Presence | 8 | 14 | |
Absence | 26 | 12 | |
Vertebral body slip (≥ 3 mm) | 0.596 | ||
Presence | 17 | 9 | |
Absence | 18 | 15 | |
Scoliosis (Cobb angle ≥ 10°) | 0.491 | ||
Presence | 7 | 3 | |
Absence | 27 | 23 | |
Block on myelography | 0.095 | ||
Completely blocked | 24 | 11 | |
Not completely blocked | 8 | 11 | |
Root defect | 2 | 4 | |
Redundant nerve roots | 0.044* | ||
Presence | 3 | 8 | |
Absence | 31 | 18 |