The American College of Rheumatology 1990 criteria for the classification of takayasu arteritis

TLDR

The authors derived Takayasu arteritis classification criteria by comparing 63 patients with 744 vasculitis controls, selecting six clinical and imaging features and also constructing a five‑criterion classification tree that excludes claudication. Using these criteria, requiring three or more of the six features yielded 90.5 % sensitivity and 97.8 % specificity, while the five‑criterion tree achieved 92.1 % sensitivity and 97.0 % specificity.

Abstract

Abstract Criteria for the classification of Takayasu arteritis were developed by comparing 63 patients who had this disease with 744 control patients with other forms of vasculitis. Six criteria were selected for the traditional format classification : onset at age ≤40 years, claudication of an extremity, decreased brachial artery pulse, >10 mm Hg difference in systolic blood pressure between arms, a bruit over the subclavian arteries or the aorta, and arteriographic evidence of narrowing or occlusion of the entire aorta, its primary branches, or large arteries in the proximal upper or lower extremities. The presence of 3 or more of these 6 criteria demonstrated a sensitivity of 90.5% and a specificity of 97.8%. A classification tree also was constructed with 5 of these 6 criteria, omitting claudication of an extremity. The classification tree demonstrated a sensitivity of 92.1% and a specificity of 97.0%.