| aOR | Adjusted odds ratio |
| ATS | American Thoracic Society |
| CI | Confidence interval |
| ICU | Intensive care unit |
| IDSA | Infectious Diseases Society of America |
| IQR | Interquartile range |
| IV | Intravenous |
| LOS | Length of hospital stay |
| sCAP | Severe community-acquired pneumonia |
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