Fig. 6From: Prediction of early vascular cement leakage following percutaneous vertebroplasty in spine metastases: the Peking University First Hospital Score (PUFHS)Plotting decile of the PUFHS-predicted probability of vascular canal cement leakage against the observed proportions in the training group (Calibration slope = 0.78 and intercept = 0.06). The red line indicates the smooth was fitted using linear regression analysis in the Microsoft Excel softwareBack to article page