Figure 1. ROC curve of the prediction model. (A) ROC curve of the simple prediction model based on osteocalcin alone. (B) ROC curve of the modified prediction model based on osteocalcin, gender, NIHSS score at admission, calcium level, and fasting blood glucose level. (C) Performance comparison between the simple prediction model and the modified prediction model. (D) Calibration curve of the simple prediction model. (E) Calibration curve of the modified prediction model.