Results of the multivariate Cox’s proportional-hazard model (χ2 112.3, p<0.0001) to predict mortality in patients with COVID-19
| Variable | OR | 95% CI | P value |
| Invasive mechanical ventilation | 3.31 | 2.32 to 4.74 | <0.0001 |
| Intensive care unit admission | 2.18 | 1.56 to 3.04 | <0.0001 |
| Age | 1.02 | 1.06 to 2.05 | 0.001 |
| Manchester Triage System | |||
| Standard and non-urgent | – | Reference | 0.008 |
| Urgent | 1.44 | 1.06 to 2.05 | 0.02 |
| Immediate and very urgent | 2.02 | 1.25 to 3.26 | 0.004 |
| Baseline C reactive protein | 1.002 | 1.001 to 1.003 | 0.009 |
| Antecedent of kidney disease | 1.58 | 1.02 to 2.45 | 0.04 |
Independent variables included in the model: age, sex female=0 and male=1), diabetes mellitus (no=0 and yes=1), arterial hypertension (no=0 and yes=1), antecedent of cardiovascular disease (no=0 and yes=1), antecedent of kidney disease (no=0 and yes=1), Manchester Triage System Scale, leukocytes, lymphocytes, C reactive protein, troponin I, invasive mechanical ventilation (no=0 and yes=1), intensive care unit admission (no=0 and yes=1), renal replacement therapy (no=0 and yes=1), coagulopathy complication (no=0 and yes=1), use of antibiotics (no=0 and yes=1) and use of steroids (no=0 and yes=1).