نتایج جستجو برای: survival analysis
تعداد نتایج: 3074356 فیلتر نتایج به سال:
A number of nonparametric methods exist when studying the population and its parameters in the situation when the distribution is unknown. Some of them such as "resampling bootstrap method" are based on resampling from an initial sample. In this article empirical likelihood approach is introduced as a nonparametric method for more efficient use of auxiliary information to construct...
Background: Kidney transplantation had been evaluated in some researches in Iran mainly with clinical approach. In this research we evaluated graft survival in kidney recipients and factors impacting on survival rate. Artificial neural networks have a good ability in modeling complex relationships, so we used this ability to demonstrate a model for prediction of 5yr graft survival after ki...
Background and Objectives : Various studies have reported different survival rates of patients with gastric cancer in Iran, and there is no overall estimate of the survival rate. The aim of this study was to conduct a meta-analysis of one, three, and five-year survival rate of patients with gastric cancer in Iran. Methods: In this study, all of the national databases including Iran Medex...
Background and Objective: Breast cancer is the most common cancer and the major cause of cancer death among women. The survival rate for breast cancer indicates the percentage of people that survive the disease for a specified period of time after diagnosis. The aim of this study was analyzing the survival rate of patients with breast cancer in East Azarbaijan province. Materials and Methods...
the aim of this study was to assess the predictive effect of the ebmt risk score on the outcomes of allogeneic stem cell transplantation in a relatively homogenous group of acute myelogenous leukemia (aml) patients regarding the occurrence of acute and chronic graft versus host disease (gvhd). this historical cohort study included adult patients (≥ 15 years old) with aml (n=363) who received al...
background : breast cancer is the most common cancer among jordanian women, yet survival data are scarce. this study aims to assess the observed five-year survival rate of breast cancer in jordan from 1997 to 2002 and to determine factors that may influence survival. methods : data were obtained from the jordan cancer registry (jcr), which is a population-based registry. from 1997-2002, 2121 pa...
Often in practice the data on the mortality of a living unit correlation is due to the location of the observations in the study. One of the most important issues in the analysis of survival data with spatial dependence, is estimation of the parameters and prediction of the unknown values in known sites based on observations vector. In this paper to analyze this type of survival, Cox...
Abstract. In many statistical studies, we are faced with variables such as duration of unemployment, duration of illness to death, the lifespan of a piece, duration of approval of a bill in the parliament, and other similar cases. In such studies, the aim is to find and model the sources that affect the duration of the study period to control the mentioned period by identifying an...
background: the oncologic behavior of mucinous adenocarcinoma (ma) of colorectal differs from non-mucinous adenocarcinoma (nma). ma is more advanced at diagnosis and has a poorer prognosis than nma. we aimed to evaluate prognostic factors and survival rate in patients with ma compared with nma in western iran. methods: during 2008-2015 in a retrospective study, 83 patients with crc referred to ...
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