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Showing 1 to 5 of 5 for “"Proportional hazards(PH) model"”.
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Simulation Comparisons of Semi-Parametric Accelerated Failure Time Model With Different Bandwidths
<p>The proportional hazards (PH) model and the accelerated failure time (AFT) model are the most popular models to fit the censoring data. Sometimes, the PH assumption cannot be satisfied, and therefore, the AFT model becomes a useful alternative to the PH model. Comparing with the least square …
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Optimal and Robust Designs of Step-stress Accelerated Life Testing Experiments for Proportional Hazards Models
… a product within a limited time frame. The Cox s proportional hazards (PH) model is often utilized for reliability prediction. My master thesis research focuses on designing accelerated life testing experiments for reliability estimation. We consider multiple step-stress ALT plans with censoring. …
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Extending Sample Size Calculation for the Cox Proportional Hazards Model
… such as trials for the non-Hodgkin's lymphoma disease. The popularly used sample size formula derived under the Cox proportional hazards (PH) model may not be proper to design a survival trial with a cure fraction, since the PH model assumption may be violated. To account for a cure …
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A study of the robustness of Cox's proportional hazards model used in testing for covariate effects
There are two important statistical models for multivariate survival analysis, proportional hazards(PH) models and accelerated failure time(AFT) model. PH analysis is most commonly used multivariate approach for analysing survival time data. For example, in clinical investigations where several …
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Modelling gametocytes in the presence of interval-censoring
… Antimalarial Therapy (SEACAT) evaluation of the phased introduction of combination antimalarial drug under the Lubombo Spatial Development Initiative. Patients were observed on days 0, 3, 7, 14, 21, 28 and 42, where blood samples were collected and were analysed, providing gametocyte densities …