Survival analysis with change-points in covariate effects
Chun Yin Lee, KF Lam
Abstract
We apply a maximal likelihood ratio test for the presence of multiple change-points in the covariate effects based on the Cox regression model. The covariate effect is assumed to change smoothly at one or more unknown change-points. The number of change-points is inferred by a sequential approach. Confidence intervals for the regression and change-point parameters are constructed by a bootstrap method based on Bernstein polynomials conditionally on the number of change-points. The methods are assessed by simulations and are applied to two datasets.
Topics & Concepts
CovariateStatisticsMathematicsConfidence intervalProportional hazards modelRegressionTime pointRegression analysisEconometricsPhilosophyAestheticsStatistical Methods and InferenceStatistical Methods in Clinical TrialsAdvanced Causal Inference Techniques