Points of variables according to Spetzler-Martin grading scale and supplementary Spetzler-Martin grading scale.

<p>Points of variables according to Spetzler-Martin grading scale and supplementary Spetzler-Martin grading scale.</p

Univariable logistic regression analysis.

<p>Univariable logistic regression analysis.</p

Multivariable logistic regression analysis.

<p>Multivariable logistic regression analysis.</p

Graph showing receiver-operating characteristic analyses for the Spetzler-Martin grading system and the supplemented grading system.

<p>Graph showing receiver operating characteristic (ROC) analyses for the weighted point scores of the Spetzler-Martin grading system (green curve), and the supplementary grading system (red curve) (reference line shown in teal). The predictive accuracy of Spetzler-Martin score was similar to supplementary grade (ROC areas, 0.726 and 0.734, respectively, P = .715).</p

Characteristics of arteriovenous malformations according to Spetzler-Martin grading scale and supplementary grading scale.

<p>Characteristics of arteriovenous malformations according to Spetzler-Martin grading scale and supplementary grading scale.</p