Table 4. Multivariate hazard ratios for risk factors for acquired colonization with AROs, according to Cox regression analysis.
| Variables | Nasal colonization (N = 123) | Rectal colonization (N = 199) | Endotracheal colonization (N = 80) | |||
|---|---|---|---|---|---|---|
| HR (95% CI) | p | HR (95% CI) | p | HR (95% CI) | p | |
| Admission for tetanus disease | 0.46 (0.29–0.74) | 0.001 | 0.39 (0.27–0.56) | <0.001 | 0.67 (0.33–1.36) | 0.27 |
| Charlson Comorbidity Index score | 1.14 (0.97–1.35) | 0.12 | 1.13 (1.01–1.25) | 0.04 | 1.42 (1.03–1.94) | 0.03 |
| Admission colonization status | ||||||
| Admission nasal colonization | 0.57 (0.32–1.01) | 0.05 | - | - | - | - |
| Admission rectal colonization | - | - | 1.19 (0.80–1.76) | 0.40 | - | - |
| Admission endotracheal colonization | - | - | - | - | 0.76 (0.40–1.45) | 0.41 |
| Receipt of antimicrobial treatment on admission | 1.28 (0.80–2.04) | 0.31 | 1.19 (0.84–1.71) | 0.33 | 1.20 (0.66–2.18) | 0.55 |
| Intensive care procedures on admission | ||||||
| Nasogastric tube | 1.05 (0.68–1.61) | 0.83 | 0.62 (0.46–0.83) | 0.002 | 0.80 (0.48–1.33) | 0.40 |
| Respiratory support | 1.16 (0.77–1.75) | 0.49 | - | - | 0.82 (0.50–1.35) | 0.45 |