Table 5. Variables associated with death due to COVID-19: Cox regression analysis, Islamic Republic of Iran, 2021.
| Independent variable | HR (95% CI) |
|
|---|---|---|
| Partial immunity perioda | Full immunity periodb | |
| Age, years | 1.06 (1.01–1.11) | 1.11 (1.04–1.17) |
| Female sex | 0.59 (0.25–1.37) | 0.88 (0.33–2.38) |
| Education, years | 0.98 (0.90–1.07) | 0.98 (0.88–1.09) |
| Vaccine brand | ||
| SARS-CoV-2 Vaccine (Vero Cell), Inactivated (lnCoV) | Reference | Reference |
| Sputnik V | 1.18 (0.11–13.01) | NAc |
| AZD1222 Vaxzevria | 0.32 (0.13–0.83) | 0.56 (0.12 – 2.64) |
| CovIran® vaccine | 0.97 (0.25–3.74) | 2.89 (0.43 – 19.44) |
| Chronic renal diseases | NAd | 5.13 (1.15–22.93) |
CI: confidence interval; COVID-19: coronavirus disease 2019; HR: hazard ratio in multiple Cox regression model.
a Defined as the period between the 14th day after the first dose and 14 days after the second dose.
b Defined as the period between the 14th day after the second dose and the end of follow-up.
c No deaths occurred.
d Not entered in the final stepwise Cox regression models as P ≥ 0.1 in the univariate analysis.