نتایج جستجو برای: stratifi ed cox proportional hazards model
تعداد نتایج: 2242673 فیلتر نتایج به سال:
Prognostic models are often used to estimate the length of patient survival. The Cox proportional hazards model has traditionally been applied to assess the accuracy of prognostic models. However, it may be suboptimal due to the inflexibility to model the baseline survival function and when the proportional hazards assumption is violated. The aim of this study was to use internal validation to ...
Abstract Survival (overall, event free, etc.) is the most-used outcome in clinical oncology studies. This study analyzed methodological reporting of survival analysis pediatric leukemia studies, focusing on Cox proportional hazards (PH). We performed a systematic review studies published between 2012 and 2021 five highest-ranking hematology journals. The included had to focus utilize analyses. ...
In this paper, some new statistical methods are proposed, for making inferences about the parameter indexing a Cox proportional hazards marginal structural model for point exposure. Under the key assumption that unmeasured confounding is absent, we propose a new class of closed-form estimators that are doubly robust in the sense that they remain consistent and asymptotically normal for the e¤ec...
Federal law prohibits discrimination in employment decisions against persons in certain protected categories. The common method for measuring discrimination involves a comparison of some aggregate statistic for protected and non-protected individuals. This approach is open to question when employment decisions are made over an extended time period. We show how to use hierarchical proportional h...
BACKGROUND A simple risk score to predict long-term mortality after percutaneous coronary intervention (PCI) using preprocedural risk factors is currently not available. In this study, we created one by simplifying the results of a Cox proportional hazards model. METHODS AND RESULTS A total of 11,897 patients who underwent PCI from October through December 2003 in New York State were randomly...
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