生物医学系统与新兴技术杂志

Gradient Curve of Cox Proportional Harzard and Weibull Models

Abstract

Muritala Abdulkabir, Ahmadu Abdulaziz Oshioke, Udokang Anietie Edem and Raji Surajudeen Tunde

This study centers on the comparison between the gradient curve of the cox proportional hazard and weibull models. It has two faces, the simulated and the real life data approach. The data used for this research work is on tuberculosis diseases for the year 2011. It was observed from the real life data that the shape parameter of the weibull model does not depend or have effect on the performance of the Cox proportional hazard model. It was also observed that both models perform similarly when the distributional assumptions are not met except when sample size is small and the weibull model out-perform the Cox model when the distributional assumption are met and the shape parameter known.