A Competing Risks Model with Time-varying Heterogeneity and Simultaneous Failure
نویسنده
چکیده
This paper proposes a new bivariate competing risks model that speci es each marginal duration as the rst time a Lévy subordinator crosses a random threshold. Our speci cation is a natural variant of the competing risks version of the mixed proportional hazards model, but it allows time-varying heterogeneity and simultaneous termination of both durations. When the structural multiplicative e¤ects from covariates are of linear-index forms, we identify these e¤ects, the baseline hazard function, and the characteristics of latent Lévy subordinators with competing risks data. Semiparametric estimation of nite dimensional parameter in our model is developed based on certain average derivative estimation.
منابع مشابه
Parametric Estimation in a Recurrent Competing Risks Model
A resource-efficient approach to making inferences about the distributional properties of the failure times in a competing risks setting is presented. Efficiency is gained by observing recurrences of the compet- ing risks over a random monitoring period. The resulting model is called the recurrent competing risks model (RCRM) and is coupled with two repair strategies whenever the system fails. ...
متن کاملMonitoring the censored lognormal reliability data in a three-stage process using AFT model
Improving the product reliability is the main concern in both manufacturing and service processes which is obtained by monitoring the reliability-related quality characteristics. Nowadays, products or services are the result of processes with dependent stages referred to as multistage processes. In these processes, the quality characteristic in each stage is affected by the quality characterist...
متن کاملDetermining factors contributing to the five-year survival of children suffering from acute lymphoblastic leukemia based on tree survival model in the presence of competing risks
Abstract Background and objectives: Leukemia is one of the most prevalent cancers worldwide. The relapse of the disease mitigates patient survival time. The convenience of explaining the results obtained from analyzing tree models have encouraged doctors and paramedics to employ them in their research. The current study is an attempt to determine the five-year survival time and factors influen...
متن کاملکاربرد مدل ریسک رقابتی در شناسایی عوامل موثر بر زمان بقای بیماران مبتلا به سرطان کولورکتال
Background and Objective: Colorectal cancer is the most common cancer of digestive system in Iran.The incidence of this cancer has increased in recent years.The aim of this study was to evaluate the survival rate and to define the prognostic factors in Iranian colorectal cancer patients using competing risk model. Materials and Methods: Data recorded from 1060 patients with colorectal cancer...
متن کاملReliability Analysis of Three Elements Series and Parallel Systems under Time-varying Fuzzy Failure Rate
Reliability is the most important performance issue in the engineering design process but in the real world problems, there are limitations for using the conventional reliability. Fuzzy logic has proved to be effective in expressing uncertainties in different fields, including reliability engineering. In this paper, For both the series and parallel systems composed of three identical or differe...
متن کامل