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Diagnostic Accuracy of CT Scan in Detecting Postoperative Recurrence after Curative Gastrectomy
Sensitivity = 85.8% (18 / 21).
Specificity = 62 / 71 = 87.3%.
Positive predictive value = 18 / 27 = 66.7%.
Negative predictive value = 62 / 65 = 95.4%.
Accuracy = (18 + 62) / 92 = 87.0%
