Citation:
Clelia Di Serio, Yosef Rinott, and Marco Scarsini. “Simpson S Paradox For The Cox Model”. Discussion Papers 2007. Web.
Abstract:
{In the context of survival analysis, we define a covariate X as protective (detrimental) for the failure time T if the conditional distribution of [T | X = x] is stochastically increasing (decreasing) as a function of x. In the presence of another covariate Y, there exist situations where [T | X = x