Table 2.

The American College of Rheumatology 1990 GCA Classification Criteria.

GCA Classification Criteria
(1) Age at onset ≥50 years
(2) A new headache
(3) Temporal artery abnormality such as tenderness to palpation or decreased pulsation
(4) Erythrocyte sedimentation rate ≥50 mm/h
(5) Abnormal artery biopsy showing vasculitis with mononuclear cell or granulomatous inflammation, usually with giant cells

At least three of the five parameters must be present, which yields a sensitivity of 93% and a specificity of 91%, in relation to controls with other vasculitides.

RMMJ Rambam Maimonides Medical Journal Rambam Health Care Campus 2016 October; 7(4): e0035.
Special Issue on Rheumatology Guest Editor: Alexandra Balbir-Gurman, M.D.
ISSN: 2076-9172
Published online 2016 October 31. doi: 10.5041/RMMJ.10262.