Fig. 2

Visual analysis results of Model A. A ROC curve of analysis cohort. B Calibration plots of analysis and validation cohorts. C ROC curve of validation cohort. D Nomogram plot of analysis cohort. ROC receiver operating characteristic curve, AUC area under the curve, fT3 free triiodothyronine, fT4 free thyroxine, TRAb thyroid stimulating hormone receptor autoantibody. The nomogram plot is used by entering the categorical status of each patient-related factor, calculating scores for each item, and summing the total score to assess the risk of refractory GD