For classification purposes, a patient is said to have RA if he or she has satisfied at least 4 of the following 7 criteria. Criteria 1 through 4 must have been present for at least 6 weeks. Patients with 2 clinical diagnoses are not excluded. Designation as classic, definite, or probable RA is not to be made.
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Revised Criteria for the Classification of Giant-Cell Arteritis (GCA)
Giant Cell Arteritis (GCA) is a systemic vasculitis of the medium and large sized vessels with a tendency to involve extracranial branches of the carotid arteries.
Criteria for the Classification of the Antiphospholipid Syndrome (APS)
Clinical Criteria
Vascular thrombosis
- One or more clinical episodes of arterial, venous, or small-vessel thrombosis, occurring within any tissue or organ
Braunwald Classification of Unstable Angina (UA)
A classification has been proposed by Braunwald to facilitate the assignation of patients to a particular risk group. This classification takes into account the severity of symptoms, the clinical circumstances surrounding the anginal episode, and the intensity of treatment.
1993 Revised Classification System for HIV Infection and Expanded AIDS Surveillance Case Definition for Adolescents and Adults
CDC has revised the classification system for HIV infection to emphasize the clinical importance of the CD4+ T-lymphocyte count in the categorization of HIV-related clinical conditions.
Classification and Severity of Angina
Class I
No angina with ordinary physical activity (e.g., walking, climbing stairs). Angina with strenuous or prolonged exertion.
Class II
Early-onset limitation of ordinary activity (e.g., walking rapidly or walking >2 blocks; climbing stairs rapidly or climbing >1 flight); angina may be worse after meals, in cold temperatures, or with emotional stress.