Estimation of treatment effects in weighted log-rank tests

  title={Estimation of treatment effects in weighted log-rank tests},
  author={Ray Shih-Jui Lin and Larry Frank Leon},
  booktitle={Contemporary clinical trials communications},
Non-proportional hazards have been observed in clinical trials. The log-rank test loses power and the standard Cox model generally produces biased estimates under such conditions. Weighted log-rank tests have been utilized to increase the test power; however, it is not intuitive how to interpret the test result in terms of the clinical effect. We propose a Cox-model based time-varying treatment effect estimate to complement the weighted log-rank test. The score test from the proposed model is… CONTINUE READING