Table 5.
Factors independently associated with isolation of PPMs: Binary logistic regression analysis
| PPMs | Independent variables | OR | 95% CI | p |
|---|---|---|---|---|
| S. aureus | PaCO2> 45 mmHg vs <45 mmHg | 0.045 | 0.004–0.521 | 0.013 |
| P. aeruginosa | PaCO2> 45 mmHg vs <45 mmHg | 43.2 | 4.48–416.12 | 0.001 |
| K. pneumoniae | PaCO2> 45 mmHg vs <45 mmHg | 33.5 | 1.54–728.72 | 0.025 |
| Age > 55 years vs < 55 years | 1.2 | 1.03–1.38 | 0.017 | |
| Systemic steroid yes vs no | 55.3 | 2.50–1224.38 | 0.011 |
*CI: confidence interval; OR: odds ratio; PPM: potentially pathogenic microorganisms