Fig. 2
From: Lymph node metastasis of papillary thyroid carcinoma in the context of Hashimoto’s thyroiditis
ROC curve of central LNM prediction model in the HT group. Logit (π) = −0.50-1.78*X1 + 0.99*X2, AUC = 0.70 (95%CI, 0.61–0.78). Cut-off value = 0.46, Youden index = 0.32, Sensitivity = 64%, Specificity = 68%, PPV = 63%, NPV = 68%. X1, age; X2, tumor size. π, the conditional probability of a positive result (central lymph node metastasis). AUC, area under the curve