Characteristics and disease aetiologies of critically ill patients
| Characteristics | Before the outbreak | After the outbreak | P value |
| Critical patients, n (%) | 29 (1.00) | 38 (1.10) | 0.713 |
| Age (years), median (range) | 62 (47–76） | 63 (47–78) | 0.548 |
| Sex, n (%) | 0.630 | ||
| Male | 15 (51.72) | 22 (57.89) | |
| Female | 14 (48.28) | 16 (42.11) | |
| APACHE II score | 16.1±6.67 | 18.74±6.72 | 0.116 |
| Diagnosis, n (%) | |||
| Fever | 29 (100) | 38 (100) | |
| Septic shock | 9 (31.03) | 12 (31.58) | |
| Pneumonia with respiratory failure | 9 (31.03) | 10 (26.31) | |
| Acute myocardial infarction | 2 (6.70) | 2 (5.26) | |
| Gastrointestinal bleeding | 2 (6.90) | 1 (2.63) | |
| Acute cerebrovascular disease | 1 (3.45) | 4 (10.52) | |
| Intracranial metastasis of lymphoma | 0 (0) | 1 (2.63) | |
| Central nervous system infection | 2 (6.90) | 1 (2.63) | |
| Acute myocarditis | 1 (3.45) | 1 (2.63) | |
| Tachyarrhythmia | 2 (6.90) | 0 (0) | |
| Ruptured iliac aneurysm | 1 (3.45) | 0 (0) | |
| Acute aortic dissection | 0 (0) | 1 (2.63) | |
| Diffuse alveolar haemorrhage with SLE | 0 (0) | 1 (2.63) | |
| Acute left heart failure | 0 (0) | 2 (5.26) | |
| Acute pulmonary embolism | 0 (0) | 1 (2.63) | |
| Hyperosmolar hyperglycaemic state | 0 (0) | 1 (2.63) | |
| Prognosis, n (%) | 0.021 | ||
| Improvement | 16 (55.17) | 17 (44.74) | |
| Non-improvement | 4 (13.79) | 0 (0) | |
| Death | 9 (31.03) | 21 (55.26) |
APACHE II, Acute Physiology and Chronic Health Examination II; SLE, systemic lupus erythematosus.