Table 4.
Multivariate logistic analyses to characterize factors associated with the different outcome of interest.
| Variable | OR + | SE ° | 95% CI ^ | p-Value |
|---|---|---|---|---|
| Model 1. Adequate knowledge about type of antibiotic used, the timing of its administration, and the length of the prophylaxis in the case vignettes | ||||
| Log likelihood = −276.42, χ2 = 36.6 (6 df), p < 0.0001 (sample size = 449) | ||||
| Specialty | ||||
| Anesthesiology * | 1 * | |||
| General surgery | 2.65 | 0.63 | 1.66–4.21 | <0.001 |
| Who were aware about the availability of national guidelines on PAP | 1.69 | 0.39 | 1.07–2.67 | 0.023 |
| Who agreed that PAP must be performed within 60 min before surgical incision | 1.82 | 0.52 | 1.04–3.17 | 0.035 |
| First year of training | 1.55 | 0.36 | 0.98–2.45 | 0.059 |
| Center of Italy as geographic area of activity | 0.56 | 0.19 | 0.28–1.1 | 0.094 |
| Knowledge of Infection Index Risk | 1.45 | 0.42 | 0.81–2.57 | 0.206 |
| Model 2. Resident physicians who were very concerned that patients may contract SSIs during hospitalization | ||||
| Log likelihood = −153.56, χ2 = 50.4 (8 df), p < 0.0001 (sample size = 439) | ||||
| Specialty | ||||
| Anesthesiology * | 1 * | |||
| General surgery | 0.1 | 0.07 | 0.03–0.36 | <0.001 |
| Surgical specialties | 0.17 | 0.09 | 0.06–0.48 | 0.001 |
| Who were aware about Infection Control Committee in their hospital | 3.36 | 1.02 | 1.85–6.1 | <0.001 |
| Adequate knowledge about type of antibiotic used, the timing of its administration, and the length of the prophylaxis in the case vignettes | 1.75 | 0.53 | 0.96–3.17 | 0.068 |
| Female | 1.61 | 0.49 | 0.88–2.93 | 0.12 |
| Northern Italy as geographic area of activity | 2.04 | 1.09 | 0.72–5.81 | 0.181 |
| Age | 1.33 | 0.4 | 0.74–2.41 | 0.338 |
| Who were aware that SSIs are preventable infections | 1.44 | 0.58 | 0.66–3.19 | 0.36 |
| Model 3. Resident physicians who were very concerned about the development of multi-resistant antibiotic bacteria | ||||
| Log likelihood = −287.32, χ2 = 32.3 (6 df), p < 0.0001 (sample size = 439) | ||||
| Knowledge of Infection Index Risk | 2.29 | 0.68 | 1.28–4.1 | 0.005 |
| Specialty | ||||
| Anesthesiology * | 1 * | |||
| General surgery | 0.51 | 0.17 | 0.27–0.98 | 0.044 |
| Surgical specialties | 0.54 | 0.15 | 0.31–0.94 | 0.03 |
| Center of Italy as geographic area of activity | 0.56 | 0.19 | 0.28–1.09 | 0.086 |
| Northern Italy as geographic area of activity | 0.64 | 0.18 | 0.37–1.12 | 0.118 |
| Age | 1.19 | 0.24 | 0.8–1.78 | 0.397 |
| Model 4. Utility of PAP in reducing SSIs | ||||
| Log likelihood = −267.89, χ2= 37.3(8 df), p < 0.0001 (sample size = 447) | ||||
| Specialty | ||||
| Anesthesiology * | 1 * | |||
| General surgery | 0.39 | 0.12 | 0.22–0.72 | 0.002 |
| Surgical specialties | 0.82 | 0.19 | 0.52–1.3 | 0.397 |
| Who were aware about Infection Control Committee in their hospital | 1.81 | 0.4 | 1.18–2.78 | 0.006 |
| Who were aware that SSIs are preventable infections | 2.02 | 0.56 | 1.17–3.48 | 0.011 |
| Adequate knowledge about type of antibiotic used, the timing of its administration, and the length of the prophylaxis in the case vignettes | 1.65 | 0.36 | 1.07–2.55 | 0.023 |
| Who agreed that PAP must be performed within 60 min before surgical incision | 1.73 | 0.51 | 0.96–3.1 | 0.066 |
| Female | 1.45 | 0.31 | 0.96–2.2 | 0.076 |
| Knowledge of Infection Index Risk | 1.58 | 0.47 | 0.89–2.82 | 0.119 |
+ Odds Ratio, ° Standard Error, ^ Confidence Interval, * Reference category.