Prognostic value of preoperative carcinoembryonic antigen/tumor size in rectal cancer

Figure 2 Maximally selected rank statistics for carcinoembryonic antigen/tumor size. Maximally selected rank statistics were used to identify the optimal discriminator value for the carcinoembryonic antigen/tumor size, which was conducted in the training cohort. For every potential cutoff point, the absolute value of the standardized log-rank statistic was computed. The cutoff point that provided the best separation of the survival outcome into two groups, where the standardized statistics reached their maximum, was selected as the cutoff point. CEA: Carcinoembryonic antigen.