Table 2.
Patient demographics.
| Safety analysis (n = 96) |
Efficacy analysis (n = 57) | P | ||
|---|---|---|---|---|
| Sex (M/F) | 46/50 | 22/35 | 0.76 | |
| Age (years; mean ± SD) | 69.1 ± 10.6 | 71.0 ± 8.7 | 0.85 | |
| Height (cm; mean ± SD) | 158.7 ± 9.2 | 156.9 ± 8.3 | 0.66 | |
| Weight (kg; mean ± SD) | 58.7 ± 10.8 | 57.4 ± 10.7 | 0.85 | |
| LSS duration (months) | 38.2 ± 36.6 | 45.4 ± 42.7 | 0.67 | |
|
| ||||
| Stenosis severity on MRI, n (%) | Mild | 24 (25.3) | 9 (15.8) | 0.55∗ |
| Moderate | 42 (44.2) | 25 (43.9) | ||
| Severe | 29 (30.5) | 23 (40.4) | ||
|
| ||||
| LSS pathology, n (%) | Spinal nerve compression | 34 (36.2) | 16 (28.6) | 0.82∗ |
| Cauda equina compression | 10 (10.6) | 7 (12.5) | ||
| Both (mixed) | 50 (53.2) | 33 (58.9) | ||
∗Significantly different according to chi-square and Fisher's tests.
MRI: magnetic resonance imaging; SD: standard deviation; LSS: lumbar spinal stenosis.