Objective: The objective of this study was to assess the prevalence of rheumatoid arthritis (RA) in the population of a city of 70,000 inhabitants located in Buenos Aires, Argentina.
Methods: Based on the hypothesis that RA is an underdiagnosed disease in Argentina, a capture-recapture method was applied. A local registry of RA patients of Luján City was taken as the primary source; a telephone survey was specifically carried out as a secondary source of information.