نتایج جستجو برای: cox proportional hazard model
تعداد نتایج: 2213582 فیلتر نتایج به سال:
We describe a new approach to estimating relative risks in time-to-event prediction problems with censored data fully parametric manner. Our does not require making strong assumptions of constant proportional hazards the underlying survival distribution, as required by Cox-proportional hazard model. By jointly learning deep nonlinear representations input covariates, we demonstrate benefits our...
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...
background: the aim of this study is to evaluate the association between different treatments and survival time of breast cancer patients using either standard cox model or stratified cox model. methods: the study was conducted on 15830 women diagnosed with breast cancer in british columbia, canada. they were divided into eight groups according to patients’ ages and stage of disease either cox...
BACKGROUND Refractory coeliac disease is a severe complication of coeliac disease with heterogeneous outcome. AIM To create a prognostic model to estimate survival of patients with refractory coeliac disease. METHODS We evaluated predictors of 5-year mortality using Cox proportional hazards regression on subjects from a multinational registry. Bootstrap resampling was used to internally val...
Based on the increasing property of ratio of average reversed hazard rates of two non-negative random variables a new stochastic order for the sake of comparison of two lifetime distributions is proposed. This stochastic order admits some distinguishing properties. In order to illustrate the obtained results, a semi-parametric model which is called reverse hazard power and a mixture model of pr...
This study employs a semi-parametric Cox proportional hazard model to study the relationship between survival time and bank-specific determinants of failure of commercial and agricultural banks during the recent recessionary period. Results indicate that non-performing consumer and commercial loans have seriously impaired banks‟ financial health and survival.
The Association between Depression and Medication Nonpersistence in New Users of Antidiabetic Drugs.
OBJECTIVES To measure the association between depression and nonpersistence with antidiabetic drugs (ADs) among new users of oral ADs and to estimate factors associated with nonpersistence among these new users with depression. METHODS We used administrative claims data to identify an adult cohort (≥18 years) of new oral AD users who were free of depression. We followed the patients from AD i...
The results of a Monte Carlo study of the size and power of parametric and semiparametric approaches to inference on covariate effects in survival (time-to-events) models in the presence of model misspecification and an independent censoring mechanism are reported. Basic models employed are a parametric model, where both a baseline distribution and the dependence structure of covariates on the ...
abstract background and purposes: gastrointestinal cancers including stomach adenocarcinoma are very prevalent and one the main causes of death due to cancer. mazandaran has a high mortality rate of stomach adenocarcinoma. this study was proposed for estimation of survival time in patients with stomach adenocarcinoma. materials and methods: the study was historical cohort. the samples were the ...
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