Table 5. Univariate analysis for dependent complication variable: CVA.
Degrees of freedom=1; sample size=92
P-value <0.2 was the threshold for inclusion in multivariable logistic regression analysis
CVA: cerebrovascular accident; ISS: Injury Severity Score
| Χ2 statistic | P-value | |
| Patient factors | ||
| Male gender | 0.8 | 0.359 |
| Age >65 years | 0.2 | 0.648 |
| Age >80 years | 0 | 1 |
| Smoking | 0 | 1 |
| Hypertension | 0.2 | 0.627 |
| Diabetes | 1.2 | 0.269 |
| Anticoagulation | 0 | 1 |
| Alcoholism | 3.1 | 0.076 |
| Coronary disease | 0 | 1 |
| Injury factors | ||
| Complete injury | 0 | 1 |
| High level (C1-C4) | 0 | 1 |
| Polytrauma (ISS >15) | 0.04 | 0.841 |
| Surgery factors | ||
| Surgical time >120 minutes | 0.2 | 0.605 |
| Greater than 5 levels instrumented | 0 | 1 |
| Anterior instrumentation | 0 | 1 |
| Posterior instrumentation | 0.02 | 0.877 |
| Anterior and posterior instrumentation | 0 | 1 |