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ROC curve analysis of recurrence prediction according to the 18F-FDG uptake of lymph node in 90 patients with CRC. The area under the curve was 0.683 (95%CI 0.562–0.803, P=0.015), and 1.15 was determined as the best SUVLN cut-off value for predicting recurrence. With an SUVLN of 1.15 as the threshold, sensitivity and specificity in the prediction of recurrence were 84.2% and 59.2%, respectively.
