title: Rheumatoid factor test performance on CAP survey specimens.
abstract: The participant performances on 1979 rheumatoid factor test survey specimens are tabulated. All reagents performed well on the qualitative positive and negative specimens. Prominent differences in results occurred with the weakly positive specimen. Some reagents consistently gave higher titers on the positive specimen, indicating the need for reference standards.
mesh_terms: D000372:Agglutination Tests / Q000379:methods / Q000592:standards; D005069:Evaluation Studies as Topic; D010338:Pathology, Clinical / Q000592:standards*; D011786:Quality Control; D012015:Reference Standards; D012217:Rheumatoid Factor / Q000032:analysis*; D014481:United States
chemical_list: D012217:Rheumatoid Factor