Table 5.
Multivariable Logistic Regression Model for Pooled Surgical Site Complication Risk
| Variable*† | Coefficient | 95% Wald Confidence Limits | P | |
|---|---|---|---|---|
| Upper Limit | Lower Limit | |||
| Surgical setting (PR versus OR) | 0.69 | 0.38 | 1.22 | 0.200 |
| Elixhauser comorbidity index variables | — | — | — | — |
| Chronic pulmonary disease | 1.67 | 1.21 | 2.30 | 0.002 |
| Diabetes | 1.64 | 1.33 | 2.03 | <0.0001 |
| Obesity | 1.53 | 1.23 | 1.89 | 0.000 |
| Psychological disorders/psychosis | 1.64 | 1.15 | 2.33 | 0.007 |
| Solid tumor | 2.60 | 1.57 | 4.30 | 0.000 |
| Region (versus South) | — | — | — | — |
| North central | 0.82 | 0.68 | 0.98 | 0.032 |
| North east | 0.85 | 0.67 | 1.08 | 0.173 |
| West | 1.17 | 0.92 | 1.51 | 0.205 |
| Gender (men versus women) | 1.32 | 1.13 | 1.56 | 0.001 |
| Smoking | 1.36 | 1.10 | 1.69 | 0.004 |
*Note that the following additional variables were included in the model but were eliminated through a backward term selection method: age, depression, hypertension, hypothyroidism, and neurologic disorders.
†Note that the following Elixhauser comorbidity variables were not analyzed in this model due to insignificance in univariate analysis (P > 0.20) or due to counts < 5: AIDS, chronic blood loss anemia, congestive heart failure, coagulopathy, depression, liver disease, lymphoma, fluid and electrolyte disorders, metastatic cancer, paralysis, peripheral vascular disease, pulmonary circulation disease, renal failure, valvular disease, and weight loss. Rural (versus urban) residence and insurance type were also nonsignificant.