PERBANDINGAN MODEL REGRESI WEIBULL DAN REGRESI COX PROPOSIONAL HAZARD

Bias Of The Cox Model Hazard Ratio

Estimating Emergency Room Wait Times In Changepoint Weibull Hazard Model

This paper uses duration analysis to estimate emergency room wait times. To account for multi-phrasal hazard, analysis time is fitted in a piecewise model that allows hazard to change power and direction whenever it reaches a periodic length. Such model provides a marginal improvement from other competing models where hazard is assumed to be non-monotone or one-time increasing. Results, from ap...

Random proportional Weibull hazard model for large-scale information systems

Purpose – This study aims to focus on asset management of large-scale information systems supporting infrastructures and especially seeks to address a methodology of their statistical deterioration prediction based on their historical inspection data. Information systems are composed of many devices. Deterioration process i.e. wear-out failure generation process of those devices is formulated b...

Survival analysis of thalassemia major patients using Cox, Gompertz proportional hazard and Weibull accelerated failure time models

Background: Thalassemia major (TM) is a severe disease and the most common anemia worldwide. The survival time of the disease and its risk factors are of importance for physicians. The present study was conducted to apply the semi-parametric Cox PH model and use parametric proportional hazards (PH) and accelerated failure time (AFT) models to identify the risk factors related to survival of TM ...

Estimating a smooth baseline hazard function for the Cox model

The aim of fitting a Cox model to time-to-event data is to estimate the effect of covariates on the baseline hazard function. The baseline hazard function, not itself estimated within the model, is the hazard function obtained when all covariate are set to zero. In several applications, it is important to have an explicit, preferably smooth, estimate of the baseline hazard function, or more gen...