Constructing and Validating of Nomogram
Variables that were used to construct a nomogram for predicting the CSS of patients included age, race, tumor size, grade and radiotherapy (P<0.05) (Figure 2). Each of the independent factors were scored on a point scale axis (Table 2) and the total score calculated as the sum of each score was projected on the bottom scale and the probabilities of 1-, 3- and 5-year CSS for individual patients were thus estimated.