ERBB2 and neoplasm: An example of the rules for leaf node 16 can be read as: “IF value of Stage was less than or equal to 3C, AND value of Positive-regional-node was less than or equal to 9, AND value of Tumor size was less than or equal to 7, AND value of Human epidermal growth factor receptor 2 (Her2) was equal to yes, AND value of Age was greater than 54, THEN the predicted survival status belonged to Class yes.”Overall sensitivity, specificity and accuracy of model were: 93.5%, 53% and 80.3% respectively.