Abstract Background: Esophageal cancer is often diagnosed at a stage in which the opportunity to completely cure the patients is long gone and the patient’s survival chances are very low. Different studies have estimated very different survival times for patients suffering from esophageal cancer in different parts of the country hence there is no common estimation about the survival time for c...

Background and Aim: In many medical studies along with longitudinal data, which are repeatedly measured during a certain time period, survival data are also recorded. In these situations, using models such as, mixed effects models or GEE method for longitudinal data and Cox model for survival data, are not appropriate because some necessary assumptions are not met. Instead, the joint models hav...

Background and Objectives: This study aimed to investigate the effective factors in the survival/hazard time of Covid-19 patients in three waves of epidemic.   Methods: All 880 Covid-19 patients were included in this prospective cohort study using the census method. Polymerase chain reaction was used to diagnose Covid-19. The survival status of these patients was followed up for 4 months. The...

Introduction & Objective: Myocardial infarction (MI) is one of the most important causes of mortality in human communities today. MI can disable patients, and moreover it imposes financial burden on society. Therefore, regarding to the effect of some variables in the trend of the disease, we tried to determine a 5 year survival rate for patients with MI and assess the effect of some factors o...

Background: Blood cancer (leukemia) is the cancer of blood tissue and Acute Myeloid Leukemia (AML) is the third most prevalent type in Iran. Survival time after diagnosis and its risk factors are one of the most important indicators for assessing the treatment. Methods: Data for this prospective study belong to Valiasr 2 (Imam Khomeini Hospital) AML patients during 2008-2013. A total of 85 p...