Table 4 Results of the final step of the backward logistic regression analysis. Three factors remained in the final model and are presented with their odds ratio and 95%-confidence interval. The coefficient of each factor can be used with the constante of the model to calculate a predicted risk for each patient
From: Risk factors for bacterial catheter colonization in regional anaesthesia
Coefficient | Standard error | P | Odds ratio (95%-confidence interval) | |
|---|---|---|---|---|
Catheter placement in the groin | 1.222 | 0.424 | 0.004 | 3.39 (1.48 – 7.79) |
Changing the dressing (per attempt) | 0.753 | 0.222 | 0.001 | 2.12 (1.37 – 3.29) |
Postoperative administration of an antibiotic (at least for 24 hours) | - 0.896 | 0.516 | 0.05 | 0.41 (0.12 – 1.02) |
Intercept | - 2.634 | 0.414 | < 0.0001 |