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Receiver operator characteristic (ROC) curve for amylase activity in acute pancreatitis. The sensitivity and specificity of amylase activity (cut‐off, 1400 U/L) for a diagnosis of AP were 68.9% (95% CI, 50.0–83.9%) and 81.8% (95% CI, 48.2–97.7%), respectively. Area under the ROC curve for amylase activity was 0.82 (95% CI, 0.68–0.97).
