A novel approach to determine two optimal cut-points of a continuous predictor with a U-shaped relationship to hazard ratio in survival data: simulation and application.
Yimin ChenJialing HuangXianying HeYongxiang GaoGehendra MaharaZhuochen LinJin-Xin ZhangPublished in: BMC medical research methodology (2019)
In general, the optimal equal-HR method is recommended to discretize a continuous predictor with right-censored outcomes if the predictor has an asymmetric U-shaped relationship with log relative hazards based on Cox regression models.