Figure 1: Stratification of overall survival based on image-derived score. (A) Survival difference in randomly chosen validation group (50% of the 762 patients not present in training set) using the cutpoint chosen from training set (50% of the 762 patients chosen randomly from the dataset). (B) Survival difference among patients receiving definitive chemoradiation (N=383) using a cutpoint chosen from patients treated with neoadjuvant chemoradiation followed by surgery (N=379).