TY - JOUR T1 - Dr. Naides replies JF - The Journal of Rheumatology JO - J Rheumatol SP - 1190 LP - 1190 DO - 10.3899/jrheum.210093 VL - 48 IS - 7 AU - Stanley J. Naides Y1 - 2021/07/01 UR - http://www.jrheum.org/content/48/7/1190.3.abstract N2 - To the Editor:We thank Dr. Russell for raising the issue of reporting the false positivity rate of antinuclear antibody (ANA) indirect immunofluorescent assay (IFA) testing.1 It is difficult, however, for a laboratory to state a false positive rate, per se, as the determination of “falseness” is dependent on clinical evaluation that is typically not available to most laboratories. Further, any false positive rate determined by a translational study in a given … Address correspondence to Dr. S.J. Naides, 33072 Sunharbor, Dana Point, CA 92629, USA. Email: stanley.naides{at}gmail.com. ER -