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Demographic and clinical characteristics of the patients (N=800).
| Characteristics | n (%) |
|---|---|
|
| |
| Age (years) | |
| 17–45 | 128 (16) |
| 46–65 | 212 (27) |
| >65 | 460 (58) |
| Gender | |
| Male | 373 (47) |
| Female | 427 (53) |
| Nationality | |
| Saudi | 794 (99) |
| Non-Saudi | 6 (1) |
| Comorbid illness | |
| Diabetes mellitus | 530 (66) |
| Chronic kidney disease | 175 (22) |
| Cystic fibrosis | 1 (0.1) |
| Chronic obstructive pulmonary disease | 154 (19) |
| Asthma | 236 (30) |
| Lung cancer | 30 (4) |
| Other risk factors | |
| Smoker | 101 (13) |
| Immunosuppressant therapy | 82 (10) |
