Rheumatoid Arthritis in the Pima Indians of Arizona: An Assessment of the Clinical Components of the New York Criteria

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Abstract
When a prevalence study of Rheumatoid Arthritis (RA) was made in the adult Pima Indian population living on the Gila River Reservation, a high prevalence was found using the New York criteria (5.9 per cent). This was mainly due to the high frequency of limitation of motion which brought in many undesirable subjects. After excluding it as a component of New York criteria we found a prevalence for RA of 3 per cent with a predominance among the females (3.8 as against 2.0 per cent in males). The group so defined fulfilled the requirements of the Rome criteria, showed a higher concordance with serological or radiological evidence of RA, and appeared to identify subjects in whom the experienced clinical rheumatologist would more often agree with the diagnosis.

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