National Research Institute of Tuberculosis and Lung Disease (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran TANAFFOS (Respiration) 1735-0344 23 3 2024 07 01 Estimation of Survival Probability of Patients with COVID-19 Based on Information of Patients 300 303 726121 EN Mehdi Kazempour Dizaji Mycobacteriology Research Center (MRC),National Research Institute of Tuberculosis and Lung Disease (NRITLD) , Shahid Beheshti University of Medical Sciences, Tehran, Iran Department of Biostatistics, NRITLD , Shahid Beheshti University of Medical Sciences, Tehran, Iran 0000-0002-6673-9006 Mohammad Varahram Mycobacteriology Research Center (MRC),National Research Institute of Tuberculosis and Lung Disease (NRITLD) , Shahid Beheshti University of Medical Sciences, Tehran, Iran 0000-0002-8033-1867 Ali Zare Department of Biostatistics, NRITLD , Shahid Beheshti University of Medical Sciences, Tehran, Iran Arda Kiani Tracheal Diseases Research Center, NRITLD, Shahid Beheshti University of Medical Sciences, Tehran, Iran Niloufar Alizadeh Kolahdozi Department of Biostatistics, NRITLD , Shahid Beheshti University of Medical Sciences, Tehran, Iran 0000-0001-8836-5431 Atefe Abedini Chronic Respiratory Diseasesr Research Center, NRITLD, Shahid Beheshti University of Medical Sciences, Tehran, Iran Rahim Roozbahani Clinical Tuberculosis and Epidemiology Research Center, NRITLD, Shahid Beheshti University of Medical Sciences, Tehran, Iran Payam Tabarsi Clinical Tuberculosis and Epidemiology Research Center, NRITLD, Shahid Beheshti University of Medical Sciences, Tehran, Iran Journal Article 2025 07 09 <strong>Background: </strong>In medical science, the probability of survival is a crucial index used to assess patient outcomes. This study aims to estimate the survival probability of patients diagnosed with COVID-19. <strong>Materials and Methods: </strong>In a historical cohort study, the Kaplan-Meier method was used to assess the survival probability of 4,372 COVID-19 patients treated at Dr. Masih Daneshvari Hospital in Tehran during the pandemic. <strong>Results: </strong>The study results indicated that 199 patients (4.6%) died during the treatment, while 4,173 patients (95.4%) were censored. The daily survival probability estimation for COVID-19 patients revealed that the highest and lowest survival probabilities within 100 days from disease onset were 96% and 55%, respectively. Additionally, the survival probabilities on the 20th, 50th, 70th, and 90th days from the onset of disease and treatment were 92%, 70%, 63%, and 61%, respectively<strong>.</strong> <strong>Conclusion: </strong>Estimating the survival probability of COVID-19 patients offers clinicians valuable insights into mortality rates and the effectiveness of common therapeutic strategies in treating the disease. https://www.tanaffosjournal.ir/article_726121_33862dee61f08e320d1e84a60382944e.pdf