Factors associated with a higher risk for Clostridium difficile infection at age-adjusted and sex-adjusted (model 1) and multivariate (model 2) logistic regression models
| OR | 95% CI | p Value* | |
|---|---|---|---|
| Model 1 (age-adjusted and sex-adjusted) | |||
| CIRS Comorbidity Score | |||
| First quartile (<9) | – | – | – |
| Second quartile (≥9, <13) | 2.49 | 0.84 to 7.42 | 0.10 |
| Third quartile (≥13, <17) | 2.54 | 0.85 to 7.64 | 0.09 |
| Fourth quartile (≥17) | 2.89 | 1.02 to 8.54 | 0.045 |
| Age | 1.01 | 0.97 to 1.05 | 0.47 |
| Sex (female vs male) | 0.78 | 0.41 to 1.49 | 0.45 |
| Model 2 (fully adjusted) | |||
| CIRS Comorbidity Score | |||
| First quartile (<9) | – | – | – |
| Second quartile (≥9, <13) | 3.50 | 0.48 to 25.38 | 0.22 |
| Third quartile (≥13, <17) | 2.55 | 0.85 to 7.68 | 0.09 |
| Fourth quartile (≥17) | 5.07 | 1.28 to 20.14 | 0.02 |
| Antibacterial therapy | 2.61 | 1.21 to 5.64 | 0.01 |
| Antifungal therapy | 1.54 | 0.67 to 3.53 | 0.31 |
| Age | 1.03 | 0.98 to 1.07 | 0.21 |
| Sex (female vs male) | 0.67 | 0.34 to 1.33 | 0.26 |
| Mean length of stay in our unit | 1.02 | 0.99 to 1.02 | 0.14 |
| Mean total length of stay | 1.05 | 0.99 to 1.02 | 0.43 |
CIRS, Cumulative Illness Rating Scale.
*Statistically significant differences (p≤0.05) are indicated in bold.