the survival rate and its related factors in hospitalized covid-19 patients in fars province in the south of iran: a hospital-based historical cohort study (2019 – 2022)

Background: the outbreak of the covid-19 has been a serious threat to the health and lives of many people. this study aimed to determine the survival rate and its contributing factors in covid-19 patients who were hospitalized in hospitals in fars province.materials and methods: this study is a hospital-based carried out on 119429 of covid-19 hospitalized patients in the south of iran within 2019 – 2022. information of demographics and clinical characteristics, symptoms, and comorbidity of patients were extracted from medical records. the kaplan–meier curve and the log rank test were used to compare survival rate in different groups. cox regression was employed to determine the factors that affect survival.results: the mean age of the participants was 51.5 year. the density incidence of death was estimated to be 16.8, 4.6, and 43.9 per 1000 person-days for all of patient, intensive care unit patients, and intubated patients, respectively. the multiple cox regression results suggested that risk of mortality is 5.61 times higher in patients over 75 years, 3 times higher in patients admitted to the intensive care unit, and 3.4 times higher in intubated patients. also, the risk of mortality was higher in men and those with underlying disease.conclusion: we found out that being elder, being a male, hospitalization in the intensive care unit, and being intubated would increase the risk of mortality. thus, it is treatment management of hospitalized patients is necessary, especially elderly patients and those with underlying diseases.