August 1, 1990Arthritis & Rheumatism
The American College of Rheumatology 1990 criteria for the classification of giant cell arteritis
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Discussion
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Implication
Diagnostic study establishes reliable classification criteria for giant cell arteritis among vasculitis patients, indicating over ninety percent sensitivity and specificity.
Key Points
- To develop and validate standardized classification criteria distinguishing giant cell (temporal) arteritis from other forms of vasculitis.
- Analyzed and compared clinical and laboratory findings from 214 patients with giant cell arteritis against 593 control patients diagnosed with other vasculitides.
- Evaluated a traditional format of diagnostic criteria alongside a computer-generated classification tree algorithm.
- The traditional rule required at least 3 of 5 criteria (age ≥50 years, new localized headache, temporal artery abnormality, ESR ≥50 mm/hour, and diagnostic arterial biopsy), yielding 93.5% sensitivity and 91.2% specificity.
- A 6-criterion classification tree incorporating scalp tenderness and jaw or tongue claudication while omitting ESR achieved 95.3% sensitivity and 90.7% specificity.
Cite This Study
Hunder et al. (1990) studied this question.