Table 5.
Postoperative complications and clinical outcomes in the BP and TP groups according to whether the cause of OVF was primary osteoporosis or GIOP
| Primary osteoporosis | GIOP | |||||
|---|---|---|---|---|---|---|
| BP | TP | p-value | BP | TP | p-value | |
| Cases, n | 93 | 39 | – | 11 | 16 | – |
| Mechanical complications | 67 (72.0%) | 24 (61.5%) | 0.16 | 9 (81.8%) | 8 (50%) | 0.093 |
| New vertebral fracture | 42 (45.2%) | 15 (38.5%) | 0.30 | 5 (45.5%) | 3 (18.8%) | 0.14 |
| Screw complications | 39 (41.9%) | 15 (38.5%) | 0.43 | 3 (27.3%) | 4 (25.0%) | 0.90 |
| Screw loosening | 28 (30.1%) | 14 (35.9%) | 0.54 | 1 (9.1%) | 4 (25.0%) | 0.30 |
| Screw backout | 11 (11.8%) | 1 (2.6%) | 0.08 | 2 (18.2%) | 0 | 0.076 |
| Rod fracture | 0 | 0 | – | 0 | 0 | – |
| Pseudoarthrosis | 6 (6.5%) | 0 | 0.12 | 3 (27.3%) | 1 (6.3%) | 0.13 |
| Revision due to mechanical complications | 10 (10.8%) | 7 (17.9%) | 0.27 | 0 | 2 (12.5%) | 0.50 |
| Postoperative JOA score | 9.9 ± 3.3 | 9.6 ± 3.7 | 0.75 | 9.3 ± 3.2 | 8.3 ± 3.0 | 0.49 |
| JOA score recovery rate | 49.2 ± 30.1 | 54.4 ± 25.9 | 0.32 | 48.0 ± 19.8 | 44.7 ± 26.3 | 0.69 |
| Final VAS (back pain) | 30.9 ± 23.7 | 29.8 ± 26.0 | 0.95 | 27.2 ± 20.1 | 36.2 ± 20.3 | 0.30 |
| Change in VAS (back pain) | 40.5 ± 30.9 | 40.3 ± 32.1 | 0.98 | 40.3 ± 26.7 | 38.7 ± 33.6 | 0.90 |
| Final VAS (leg pain or numbness) | 18.9 ± 21.4 | 19.9 ± 24.8 | 0.81 | 15.0 ± 14.7 | 28.9 ± 28.2 | 0.15 |
| Change in VAS (leg pain or numbness) | 34.7 ± 28.9 | 34.9 ± 31.9 | 0.87 | 29.2 ± 20.9 | 39.9 ± 25.1 | 0.28 |
BP bisphosphonate, TP teriparatide, GIOP glucocorticoid-induced osteoporosis, JOA Japanese Orthopaedic Association, VAS visual analogue scale