what type of r model does cox have what is the result of package 'concordance index' and what is the result of package 'nnt' comparing cox models to anns r compares cox to ann compare cox model to ann what is the relationship between r a t-stack and ann? compare ann & cox compare cox model to ann compare ann with cox what model is nnt in which model is r what model is hazard and survival time can you compare cox and ann is survival time a cox curve comparing cox with ann what kind of model compares cox with ann compare cox model with ann is ann and cox model alike what model is compared to ann in r what is the purpose of a cox curve