Table 3.
Multivariable Logistic Regression Model for Pooled Major Medical Complication Risk
| Variable*† | Coefficient | 95% Wald Confidence Limits | P | |
|---|---|---|---|---|
| Upper Limit | Lower Limit | |||
| Surgical setting (PR versus OR) | 0.84 | 0.53 | 1.33 | 0.450 |
| Elixhauser comorbidity index variables | — | — | — | — |
| Anemia | 3.33 | 2.46 | 4.51 | <0.0001 |
| Rheumatoid arthritis/collagen vascular disease | 2.21 | 1.62 | 3.02 | <0.0001 |
| Chronic pulmonary disease | 2.39 | 1.93 | 2.98 | <0.0001 |
| Diabetes | 2.16 | 1.85 | 2.52 | <0.0001 |
| Drug abuse | 2.08 | 1.19 | 3.64 | 0.010 |
| Hypertension | 1.80 | 1.56 | 2.08 | <0.0001 |
| Neurologic disorders | 2.16 | 1.46 | 3.19 | 0.000 |
| Psychological disorders/psychosis | 1.42 | 1.05 | 1.93 | 0.024 |
| Hypothyroidism | 1.46 | 1.10 | 1.92 | 0.008 |
| Sex (men versus women) | 1.42 | 1.24 | 1.62 | <0.0001 |
| Age category (versus 18–39) | — | — | — | — |
| 40–49 | 1.95 | 1.36 | 2.81 | <0.0001 |
| 50–59 | 3.25 | 2.32 | 4.56 | <0.0001 |
| 60+ | 4.81 | 3.40 | 6.81 | <0.0001 |
*Note that the following additional variables were included in the model but were eliminated through a backward term selection method: alcohol abuse, obesity, solid tumor without metastasis, and smoking. Rural (versus urban) residence, region, and insurance type were also nonsignificant.
†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.