Abstract
Objective There are limited data regarding the impact of comorbidities on hospitalized patients with coronavirus disease 2019 (COVID-19) in Iran. Methods We evaluated the risk of serious adverse outcomes in 1368 Iranian COVID-19 patients, admitted to five academic hospitals in Tehran between February-June 2020. The composite end-points were defined as admission to an intensive care unit, invasive ventilation, or death. The Cox proportional survival model determined the potential comorbidities associated with death. Results Overall, 576 patients (42.3%) reached the composite end-point (280 death). Adjusted for age, sex, duration of hospitalization, and the presence of the other comorbidities, patients with diabetes (RR=1.25, 95%CI; 1.08-1.44), heart failure (RR=1.45, 95%CI; 1.10-1.91), chronic kidney disease (RR=1.32, 95%CI; 1.04-1.67), malignancy (RR=1.79, 95%CI; 1.41-2.28), and lung diseases (RR=1.53, 95%CI; 1.27-1.84) were more likely to reach the composite end-point than those without the very comorbidity. Moreover, patients aged less than 65 years had a greater risk of death in the presence of two (HR=2.68, 95%CI; 1.46-4.95, p=0.002) or more (HR=3.47, 95%CI; 1.69-7.12, p=0.001) comorbidities, compared to those without any comorbidity. Conclusion To conclude, having two or more comorbidities in patients less than 65 years is associated with a greater risk of death during hospitalization.