Figure 3From: Bayesian methods to determine performance differences and to quantify variability among centers in multi-center trials: the IHAST trial The posterior density plot of the between-center standard deviation, σ e , for 15 models with variables selected from treatment, age, gender, perioperative WFNS score, baseline NIHHS score, history of hypertension, Fisher grade on CT scan, aneurysm location, aneurysm size, interval from SAH to surgery, and center. Back to article page