Survival analysis-part 2: Cox proportional hazards model.

Learning objectives: 1. To understand the log-rank test and limitations of the log-rank test in comparing survival between groups. 2. To understand the fundamental concepts of the proportional hazards assumption. 3. To understand basic steps in the development of the Cox proportional hazards model and reported hazard ratios. 4. To understand how results of a Cox model run using STATA© (a commonly used proprietary statistical software) can be understood and interpreted. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s12055-020-01108-7. © This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2021.