| Mortality |
| No | Yes | p | ||
|
| n | % | n | % | ||
| Gender | Male | 13 | 65.0 | 9 | 36.0 | 0.053 |
| Female | 7 | 35.0 | 16 | 64.0 | ||
| Previous hospitalization | No | 12 | 60.0 | 16 | 64.0 | 0.783 |
| Yes | 8 | 40.0 | 9 | 36.0 | ||
| Previous antibiotic use | No | 14 | 70.0 | 16 | 64.0 | 0.671 |
| Yes | 6 | 30.0 | 9 | 36.0 | ||
| Tracheostomy | No | 18 | 90.0 | 18 | 72.0 | 0.260 |
| Yes | 2 | 10.0 | 7 | 28.0 | ||
| Diabetes mellitus | No | 16 | 80.0 | 19 | 76.0 | 0.748 |
| Yes | 4 | 20.0 | 6 | 24.0 | ||
| Ischemic heart disease | No | 18 | 90.0 | 20 | 80.0 | 0.437 |
| Yes | 2 | 10.0 | 5 | 20.0 | ||
| Congestive heart failure | No | 17 | 85.0 | 18 | 72.0 | 0.473 |
| Yes | 3 | 15.0 | 7 | 28.0 | ||
| Coma (GCS < 7) | No | 16 | 80.0 | 11 | 44.0 | 0.014* |
| Yes | 4 | 20.0 | 14 | 56.0 | ||
| COPD | No | 14 | 70.0 | 19 | 76.0 | 0.651 |
| Yes | 6 | 30.0 | 6 | 24.0 | ||
| Advanced age (>60) | No | 12 | 60.0 | 5 | 20.0 | 0.006* |
| Yes | 8 | 40.0 | 20 | 80.0 | ||