Semicompeting risks data are often encountered in clinical trials with intermediate endpoints
subject to dependent censoring from informative dropout. Unlike with competing risks data …

The Cox proportional hazards model has become the standard for the analysis of survival
time data in cancer and other chronic diseases. In most studies, proportional hazards (PH) …

We consider marginal semiparametric partially linear models for longitudinal/clustered data
and propose an estimation procedure based on a spline approximation of the non …

We propose a natural generalization of the Cox regression model, in which the regression
coefficients have direct interpretations as temporal covariate effects on the survival function …

A new test of the proportional hazards assumption in the Cox model is proposed. The idea is
based on Neyman's smooth tests. The Cox model with proportional hazards (ie time …

We study a test comparing the full Aalen additive hazards model and the change-point
model, and suggest how to estimate the parameters of the change-point model. We also …

Several omnibus tests of the proportional hazards assumption have been proposed in the
literature. In the two-sample case, tests have also been developed against ordered …