1                             Such outcomes generally violate the assumption of proportional hazards, and the classical Cox

2                             They are usually analyzed under the assumption of proportional hazards, and the treatment eff

3 he net chance of a longer survival is useful whether or not the assumption of proportional hazards is met in the analysis

4 ich is neither an intuitive measure nor a meaningful one if the assumption of proportional hazards is not met.

5                                                             The assumption of proportional hazards was not met suggesting