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Graph shows cumulative proportion of patients without metastatic recurrence of prostate cancer after external-beam radiation therapy, stratified by the stage assigned by reader 2 at MR imaging performed prior to treatment. Kaplan-Meier analysis revealed a significant difference (P = .01) between patients with organ-confined (T1 or T2) tumor (n = 60, solid line) and those with locally advanced (T3) disease (n = 20, dashed line).
