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Fig 3. (A) Pretreatment nomogram predicting 6-year progression-free probability after salvage radiotherapy for prostate-specific antigen (PSA) recurrence after radical prostatectomy. (B) Calibration of the nomogram. Dashed line indicates reference line where an ideal nomogram would lie. Solid line indicates the performance of the current nomogram. Dots are quartiles of our data set. Instructions: Locate the patient's Gleason score on the respective axis. Draw a straight line up to the Points axis to determine how many points toward disease recurrence that the patient receives for his or her Gleason score. Repeat this process for the other 10 disease and treatment parameters. Sum the points and locate this number on the Total Points axis. Draw a straight line down to find the patient's probability of remaining free of disease progression at 6 years after salvage radiotherapy, provided the patient does not die of another cause first.
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