Fig. 3From: A novel collagen area fraction index to quantitatively assess bowel fibrosis in patients with Crohn’s diseaseOn the ROC analysis, the collagen area fraction was slightly more accurate, with an AUC of 0.815 (95% CI = 0.721–0.910, P < 0.001), than the histological fibrosis score (AUC = 0.771; 95% CI = 0.666–0.877; P < 0.001) for diagnosing CD strictures. ROC, receiver operating characteristic; AUC, area under the ROC curve; CD, Crohn’s disease; CI, confidence intervalBack to article page