Figure 2. Performance of the VALE Scoring System and Comparison With the R₂eD Scoring System.

In panel C, the area under the receiver operating characteristic curve was 0.579. In panel D, P values were .12 for low risk vs moderate risk, <.001 for low risk vs high risk, and <.001 for moderate risk vs high risk. No hemorrhagic events occurred after 20 years of follow-up; therefore, the survival plot was cut off at 20 years for better data presentation. R₂eD indicates race (non-White), exclusive deep location, small arteriovenous malformation, exclusive deep drainage, and monoarterial feeding, and monoarterial feeding (lesion with a single feeding artery); and VALE, ventricular system involvement, venous aneurysm, deep location, and exclusively deep drainage.