Nomogram to predict permanent stoma in rectal cancer patients after sphincter-saving surgery

Figure 2 The established nomogram for predicting permanent stoma was developed by incorporating the following six parameters: Local recurrence, perineural invasion, tumor size (mm), rectal stenosis, perirectal abscess and operative time. First, the nomogram is used by giving each variable a score on the “Points” scale. The scores for all variables are then added to obtain the total score after which a vertical line is drawn from the “Total points” row to estimate the predicted probability of permanent stoma.