Univariate and multivariate logistic regression analysis for SSF.
| Variable | Univariate | Multivariate | ||
| OR (95% CI) | P Value | OR (95% CI) | P Value | |
| Age ≤39 y | 0.72 (0.48–1.09) | 0.075 | 1.72 (1.03–2.87) | 0.038 |
| Men | 0.76 (0.48–1.19) | 0.223 | ||
| Public hospital | 0.60 (0.36–0.99) | 0.046 | ||
| Hypertension | 0.29 (0.10–0.86) | 0.018 | 0.25 (0.08–0.81) | 0.021 |
| Diabetes mellitus | 0.82 (0.29–2.31) | 0.699 | ||
| Obesity | 1.67 (0.52–5.36) | 0.282 | ||
| Smoker | 0.91 (0.43–1.96) | 0.817 | ||
| Preoperative medical instability | 0.33 (0.19–0.59) | <0.001 | ||
| Implant availability | 1.33 (0.80–2.21) | 0.268 | ||
| AO Spine injury | ||||
| B2 | 5.01 (3.09–8.13) | <0.001 | 3.54 (1.80–6.96) | <0.001 |
| B3 | 2.37 (0.82–6.91) | 0.094 | 9.41 (2.23–39.61) | 0.002 |
| C | 0.15 (0.09–0.26) | <0.001 | ||
| Level of injury | ||||
| Upper thoracic | 0.16 (0.06–0.41) | <0.001 | 0.11 (0.03–0.38) | 0.001 |
| Midthoracic | 0.25 (0.12–0.52) | <0.001 | 0.17 (0.05–0.52) | 0.002 |
| Thoracolumbar | 3.63 (2.25–5.86) | <0.001 | ||
| Lumbar | 1.73 (0.82–3.65) | 0.144 | ||
| Neurological status | ||||
| AIS A | 0.12 (0.06–0.24) | <0.001 | 0.32 (0.13–0.78) | 0.012 |
| AIS B | 0.47 (0.17–1.40) | 0.167 | ||
| AIS C | 0.83 (0.36–1.91) | 0.654 | ||
| AIS D | 1.68 (0.82–3.44) | 0.151 | ||
| AIS E | 3.84 (2.45–6.01) | <0.001 | ||
Abbreviations: AIS, ASIA Impairment Scale; ASIA, American Spinal Injury Association; SSF, short-segment fixation;
a Fisher’s exact test.