Determining the Related Factors to the Survival Time of Inpatients with Covid-19 in Northern Iran: A Retrospective Study

Background: Coronavirus disease 2019 is a new viral disease and in a short period, the world has been affected in various economic, social, and health aspects. This disease had a high mortality rate at the time of its occurrence. This article determines the related factors to the survival time of inpatients with COVID-19 in northern Iran. Methods: In this retrospective study, the data of 3480 patients with laboratory confirmation of the virus caused by COVID-19 infection in 17 hospitals covered by Golestan University of Medical Sciences from 20 February to 20 July 2020 were used. For all patients included in the study, until the end of the study, the follow-up has been done through the Hospital Information System unit. Statistical analysis was used statistical software R version 3.6.2 with survival package. Results: Out of 3480 definitive patients with COVID-19, The average age of the patients was 52.93 ± 19.20 years and 51.1% of them were women. 77.6% of patients recovered and 22.4% had died at the end of the study (781 patients, 22.4%). The median survival time among deceased patients was less than one day (IQR: 0–5) days. Patients with an age group above 49 years, had a 2.1 times higher chance of death than other patients. Patients who had no history of hospitalization in the ICU had a 1.77 times higher chance of death than other patients. Patients who did not use ventilators had a 1.21 times higher chance of death than other patients. Conclusion: Finally, according to the results of this study, in the early days of hospitalization, it is necessary to investigate the spread of Covid-19 in people under 49 years of age, hospitalized in ICU, and hospitalized in other cities.