Citation:
Clelia Di Serio, Y. R., & Scarsini, M. . (2007). Simpson S Paradox for the Cox Model. Discussion Papers. presented at the 1, Scandinavian Journal of Statistics 36, 463-480 (2009). Retrieved from /files/dp441.pdf
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