Main characteristics of the study population, n (%)*
| Smoking habit | |
| Non-smokers | 83 (66) |
| Smokers | 12 (10) |
| Ex-smokers | 31 (25) |
| Vaccinations | |
| Pneumococcal vaccination | 15 (15) |
| Influenza vaccination | 75 (75) |
| Autonomy for daily activities | |
| Full | 36 (31) |
| Partial | 38 (32) |
| Previous pneumonia in the last year | 23 (18) |
| Inhaled corticosteroids | 25 (19) |
| Systemic corticosteroids | 4 (3) |
| Co-morbidities | |
| Heart failure | 47 (35) |
| Chronic renal failure | 10 (8) |
| Diabetes mellitus | 28 (21) |
| Chronic liver disease | 3 (2) |
| Neurological disorders | 73 (55) |
| Chronic respiratory diseases | 51 (38) |
Chronic respiratory diseases include: asthma (4%), chronic bronchitis (9%), chronic obstructive pulmonary disease (14%), ex tuberculosis sequelae (4%), pulmonary hypertension (1%) and others (4%). Neurological disorders include: degenerative diseases, multiple sclerosis, amyotrophic lateral sclerosis, Parkinson disease, Down syndrome, vascular cerebral accidents, postanoxia brain injury and dementia.
↵* Percentages of all cases with available information.