Table 4 Postoperative complications and clinical outcomes according to whether osteoporosis was primary or glucocorticoid-induced
| Â | Primary | GIOP | p-value |
|---|---|---|---|
Cases, n | 132 | 27 | – |
Mechanical complications | 91 (67.4%) | 17 (63.0%) | 0.54 |
 New vertebral fracture | 57 (42.8%) | 8 (29.6%) | 0.21 |
 Screw complications | 54 (39.1%) | 7 (25.9%) | 0.21 |
 Screw loosening | 42 (30.4%) | 5 (18.5%) | 0.25 |
 Screw backout | 12 (8.7%) | 2 (7.4%) | 0.78 |
 Rod fracture | 0 | 0 | – |
 Pseudoarthrosis | 6 (4.3%) | 4 (14.8%) | 0.045 |
Revision due to mechanical complications | 17 (12.3%) | 2 (7.4%) | 0.43 |
Postoperative JOA | 9.7 ± 3.5 | 8.8 ± 3.0 | 0.21 |
Recovery rate of JOA | 50.7 ± 27.8 | 46.1 ± 20.1 | 0.45 |
Final VAS (back pain) | 30.0 ± 23.7 | 32.1 ± 20.6 | 0.74 |
Change in VAS (back pain) | 40.3 ± 30.9 | 39.4 ± 29.8 | 0.72 |
Final VAS (leg pain or numbness) | 19.2 ± 22.1 | 22.3 ± 23.4 | 0.79 |
Change in VAS (leg pain or numbness) | 34.2 ± 29.0 | 34.8 ± 23.3 | 0.99 |