title: Evaluation of a charcoal particle test for rheumatoid factor.
abstract: A rheumatoid factor charcoal card test was compared with a rheumatoid factor latex slide and tube agglutination test. Qualitative findings with 280 of 290 selected sera were the same. Quantitative results converted to standard rheumatoid factor units were similar.
mesh_terms: D000372:Agglutination Tests / Q000379:methods*; D002606:Charcoal; D006801:Humans; D007841:Latex Fixation Tests; D012217:Rheumatoid Factor / Q000032:analysis*
chemical_list: D002606:Charcoal; D012217:Rheumatoid Factor