Table 4. Survival Analysis for the Death Rate in Trauma and COVID-19 Patients .
| Variables and Setting | Univariate Cox Regression | Multiple Cox Regression | ||||
| HR (95% CI) | P Value | HR (95% CI) | P Value | |||
| Trauma | Age | 1.02 (1.01, 1.03) | < 0.001 | 1.03 (1.01, 1.04) | < 0.001 | |
| Gender | Female | REF | — | — | — | |
| Male | 1.28 (0.87, 1.89) | 0.21 | — | — | ||
| Nationality | IRI | REF | — | REF | — | |
| AFG | 1.33 (0.86, 2.05) | 0.20 | 1.60 (1.03, 2.49) | 0.04 | ||
| COVID-19 | Age | 1.03 (1.02, 1.04) | < 0.001 | 1.03 (1.02, 1.04) | < 0.001 | |
| NRFCD | 1.18 (1.00, 1.40) | 0.049 | 0.91 (0.70, 1.19) | 0.51 | ||
| Gender | Female | REF | — | REF | — | |
| Male | 1.20 (1.08, 1.33) | 0.001 | 1.19 (1.04, 1.37) | < 0.001 | ||
| Nationality | IRI | REF | — | REF | — | |
| AFG | 1.32 (0.98, 1.78) | 0.07 | 1.36 (0.92, 2.00) | 0.12 | ||
| Vaccine | No | REF | — | REF | — | |
| Yes | 1.15 (0.97, 1.38) | 0.11 | 1.16 (0.97, 1.39) | 0.10 | ||
Note. HR, hazard ratio; CI, Confidence interval; LOH: Length of hospitalization; IQR: Interquartile range; AFG: Afghan; IRI: Iranian; NRFCD: Number of risk factors and chronic diseases.