Table 2 Comparisons of surgical factors according to TGM usage
| Â | Total | TGM used | No TGM used | p |
|---|---|---|---|---|
n | 5520 | 1934 | 3586 | Â |
Spinal level | Â | Â | Â | Â |
Cervical | 19.2% | 21.8% | 17.8% | < 0.001 |
Thoracic | 13.7% | 14.2% | 13.5% | 0.49 |
Lumbar | 74.9% | 71.9% | 76.5% | < 0.001 |
Diagnosis | Â | Â | Â | Â |
Degenerative | 73.2% | 74.9% | 72.3% | 0.04 |
Trauma | 7.1% | 5.1% | 8.2% | < 0.001 |
Infection | 3.8% | 1.9% | 4.8% | < 0.001 |
Tumor | 3.3% | 4.4% | 2.8% | 0.001 |
Ligamentous ossification | 2.6% | 3.6% | 2.0% | < 0.001 |
Surgical factors | Â | Â | Â | Â |
Anterior approach | 4.3% | 4.9% | 4.0% | 0.14 |
Posterior approach | 84.5% | 89.8% | 81.6% | < 0.001 |
Number of levels operated | 3.2 (2.0) | 3.4 (2.0) | 3.1 (2.0) | < 0.001 |
Emergency | 11.1% | 10.3% | 11.5% | 0.17 |
Revision | 15.7% | 15.5% | 15.8% | 0.71 |
Durotomy | 6.8% | 9.5% | 5.4% | < 0.001 |
Fusion | 35.4% | 40.2% | 32.8% | < 0.001 |
Interbody fusion | 16.7% | 21.7% | 14.1% | < 0.001 |
Osteotomy | 1.1% | 2.2% | 0.5% | < 0.001 |
Microendoscopy | 35.2% | 31.1% | 37.4% | < 0.001 |