ROC curves illustrating the accuracy of the aGVHDAI across the full range of threshold values. All graphics used the common weighting system shown in Table 2. Panels A and C illustrate ROC curves when average aGVHDAI scores for each patient were used to predict day-200 NRM in the training data set and validation data set, respectively. Panels B and D illustrate ROC curves when aGVHDAI scores for each time interval were used to predict day-200 NRM in the training data set and validation data set, respectively.