A Preliminary Prediction Model with MR Plaque Imaging to Estimate Risk for New Ischemic Brain Lesions on Diffusion-Weighted Imaging after Endarterectomy or Stenting in Patients with Carotid Stenosis

Forest plot of ORs of the full penalized logistic regression model for new occurrences of hyperintense lesions on DWI after CEA or CAS. All odds of continuous variables (T1-SIR, T2-SIR, stenosis, and clinical score) are represented as odds per increase, described in parentheses. Squares and horizontal bars represent ORs and 95% CIs, respectively, on a log scale. The size of the squares represents precision.

Effects of all of the predictors on the probability of new occurrences of hyperintense lesions on DWI after CEA or CAS, holding other predictors to their medians. See text for details.

Preliminary nomogram for predicting the probability of new occurrences of hyperintense lesions on DWI after treatment (CEA or CAS) from the full penalized logistic model, by using an approximate model fitted by using ordinary least squares (R² = 0.992 against the predicted logits of the full penalized logistic model). Points are assigned for each of the 4 predictors. The total points correspond to an absolute predicted risk for occurrence of new hyperintense lesions on DWI after treatment. For each predictor, read the points assigned on the 0–100 scale and add these points. Read the results on the Total Points scale and then read the corresponding predictions below it. Postop. indicates postoperative.