| CAP | Community-acquired pneumonia |
| FS | Functional status |
| BI | Barthel Index |
| PSI | Pneumonia Severity Index |
| CGA | Comprehensive geriatric assessment |
| GNA | General nutritional assessment |
| SPMSQ | Short Portable Mental Status Questionnaire |
| CCI | Charlson Comorbidity Index |
| ADL | Activities of daily living |
| BMI | Body mass index |
| MNA | Mini Nutritional Assessment |