نتایج جستجو برای: death hazard function

تعداد نتایج: 1503037  

Journal: :international journal of hematology-oncology and stem cell research 0
kourosh sayehmiri department of social medicine and epidemiology, school of medicine, ilam university of medical sciences, iran kamran alimoghaddam hematology- oncology and stem cell transplantation research center, tehran university of medical sciences, iran ardeshir ghavamzadeh hematology- oncology and stem cell transplantation research center, tehran university of medical sciences, iran

introduction: the majority of leukemia patients are acute leukemia patients, so that about 70.8% lymphoblastic leukemia were acute lymphoblastic leukemia (all) patients and 66.4 % of myeloid leukemia patients were acute myeloid leukemia (aml) in tehran metropolitan. during the last two decades, intensification of therapy by the use of high-dose cytarabine allogeneic stem cell transplantation in...

Journal: :Annals of the Institute of Statistical Mathematics 2010

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

during natural gas processing, water in natural gas may cause to hydrates formation in pipelines which may lead to serious damages to process equipments. given the problems raised by present of water in natural gas, glycol solvent uses to remove water.in contact of glycol with gas always an amount of btex and voc absorb along with water, which on glycol recovery process, these substances separa...

, , Abbasi, Mohammad, Khazaei, Salman, Roshanaei, Ghodratollah, Safari, Malihe ,

Background and Objectives: The incidence of rectal cancer is increasing in developing societies, especially in younger age groups. The aim of this study was to evaluate the factors affecting the survival of patients with rectal cancer in the presence of competing risks.   Methods: In this retrospective cohort study, the data of 121 patients with rectal cancer during 2001-2017 were studied. De...

Journal: :گوارش 0
elnaz saeedi mohsen nasiri toosi masoud salehi saeede khosravi bizhaem jamileh abolghasemi

background: including multivariate survival data can be pointed competing risks data. there are various methods to analyze such data such as semi-parametric methods of cause-specific hazard function, and cumulative incidence function. the aim of this study was to deploy competing risks model to analyze the determinants of patients with liver cirrhosis. materials and methods: during the one-year...

Yazdani Cherati, جمشید, اعتمادی نژاد , سیاوش, شعبانخانی, بیژن , معصومی, صفورا , یوسف نژاد, کیوان ,

Abstract Background and purpose: Coronary artery disease is one of the major causes of death worldwide and analysis of survival data is important in these patients. The Cox model not only calculates the hazard function but also introduces other significant variables. Materials and methods: 128 patients referred to Mazandaran Heart Center from 2005 to 2007 and treated by angioplasty were fol...

Journal: :journal of research in health sciences 0
ali reza soltanian hossein mahjub

background : kernel smoothing method is a non-parametric or graphical method for statistical estimation. in the present study was used a kernel smoothing method for finding the death hazard rates of patients with acute myocardial infarction. methods : by employing non-parametric regression methods, the curve estimation, may have some complexity.  in this article, four indices of epanechnikov, b...

Objective(s): It has been proposed that lipid markers may predict cardiovascular events; however, their effect may vary depending on the type of cardiovascular disease. The purpose of this study was to investigate the effects of lipid markers on death from coronary heart disease (CHD) and stroke in competing risks setting.Materials and Methods:</stron...

Journal: :Annals of the Institute of Statistical Mathematics 2012
Qihua Wang Gregg E Dinse Chunling Liu

Hazard function estimation is an important part of survival analysis. Interest often centers on estimating the hazard function associated with a particular cause of death. We propose three nonparametric kernel estimators for the hazard function, all of which are appropriate when death times are subject to random censorship and censoring indicators can be missing at random. Specifically, we pres...

Journal: :journal of biostatistics and epidemiology 0
mostafa hosseini department of epidemiology and biostatistics, school of public health and institute of public health research, tehran university of medical science, tehran, iran marziye asgari 2 department of epidemiology and biostatistics, school of public health and institute of public health research, tehran university of medical science, tehran, iran mahmood mahmoodi 1 department of epidemiology and biostatistics, school of public health and institute of public health research, tehran university of medical science, tehran, iran iraj najafi department of nephrology, shariati hospital, tehran university of medical sciences, tehran, iran

b a c k g r o u n d & aim: in many studies, the survival of patients with chronic kidney disease who are treated with peritoneal dialysis technique has been considered, while this is possible in peritoneal dialysis  patients  to switch  to another  treatment.  to achieve  more  accurate  estimation  of patient survival is necessary to examine all events. the purpose of this study is to estimate...

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