Table 8. Univariate analysis for dependent complication variable: respiratory infection.
Degrees of freedom=1; sample size=92
P-value <0.2 was the threshold for inclusion in multivariable logistic regression analysis
ASIA: American Spinal Cord Injury Association; ISS: Injury Severity Score
| Χ2 statistic | P-value | |
| Patient factors | ||
| Male gender | 3.5 | 0.06 |
| Age >65 years | 3.4 | 0.064 |
| Age >80 years | 0 | 1 |
| Smoking | 0.9 | 0.329 |
| Hypertension | 2.9 | 0.085 |
| Diabetes | 0.6 | 0.438 |
| Anticoagulation | 0.6 | 0.425 |
| Alcoholism | 0.1 | 0.764 |
| Coronary disease | 0.2 | 0.692 |
| Injury factors | ||
| Complete injury (ASIA A) | 6.9 | 0.009 |
| High level (C1-C4) | 0.3 | 0.589 |
| Polytrauma (ISS >15) | 9.7 | 0.002 |
| Surgical factors | ||
| Surgical time >120 minutes | 1.2 | 0.282 |
| Greater than 5 levels instrumented | 1.4 | 0.235 |
| Anterior instrumentation | 0 | 1 |
| Posterior Instrumentation | 0 | 1 |
| Anterior and posterior instrumentation | 0.3 | 0.559 |