IgA rheumatoid factor in rheumatoid arthritis.
Lieve VAN HoovelsBert Vander CruyssenDaniela SieghartCarolien BonroyEszter NagyRille PulleritsSaša ČučnikCharlotte DahleIngmar HeijnenLuca BernasconiFarid BenkhadraLaura BogaertStefanie Van Den BremtAnn Van LiedekerkeGeert VanheuleJohan RobbrechtLucy StudholmeClaudine WirthRüdiger MüllerDiego KyburzChristopher SjöwallAlf KastbomRok JešeBoja JovancevicEmese KissPeggy JacquesDaniel AletahaGuenter SteinerPatrick VerschuerenXavier BossuytPublished in: Clinical chemistry and laboratory medicine (2022)
IgA RF showed a lower sensitivity than IgM RF. Combining IgA RF with IgM RF and ACPA did not improve sensitivity of RA classification. Combined positivity (IgA-RF/IgM-RF/ACPA) increased specificity.