Practical fecal calprotectin cut-off value for Japanese patients with ulcerative colitis

Figure 2 Receiver-operating characteristic curves for fecal calprotectin levels in predicting the histologic remission of ulcerative colitis (n = 46). A: ROC for FC in predicting remission by Riley’s score. The AUC was 0.881, 95CI: 0.780-0.981. The best cut-off value of FC was 125 μg/g, with a sensitivity of 80% and a specificity of 86%; B: ROC for FC in predicting remission by Matts grade. The AUC was 0.918, 95%CI: 0.831-1.000. The best cut-off value of FC was 123 μg/g, with a sensitivity of 88% and a specificity of 87%. ROC: Receiver-operating characteristic; FC: Fecal calprotectin; AUC: Area under the curve.