Baseline characteristics of the patients (n=442)
| Study variables | N (%) |
| Age in years (mean±SD) | 54.3±14.9 |
| Gender | |
| Male | 157 (35.5%) |
| Female | 285 (64.5%) |
| Nationality | |
| Saudi | 339 (76.7%) |
| Non-Saudi | 103 (23.3%) |
| Prognosis outcome | |
| Died | 90 (20.4%) |
| Alive | 352 (79.6%) |
| X-ray | |
| Normal | 85 (19.2%) |
| Abnormal | 357 (80.8%) |
| CT scan | |
| Normal | 87 (19.7%) |
| Bilateral ground glass opacity | 12 (02.7%) |
| More than one type | 25 (05.7%) |
| Not done | 318 (71.9%) |
| Length of hospital stay (days) (median (min–max)) | 8.00 (1–155) |