TY - JOUR T1 - Dr. Christiansen, <em>et al,</em> reply JF - The Journal of Rheumatology JO - J Rheumatol SP - 958 LP - 958 DO - 10.3899/jrheum.170315 VL - 44 IS - 6 AU - ALICE ASHOURI CHRISTIANSEN AU - KASPAR RUFIBACH AU - ULRICH WEBER Y1 - 2017/06/01 UR - http://www.jrheum.org/content/44/6/958.abstract N2 - To the Editor:We thank Dr. Sabour1 and Dr. Rothschild2 for their interest in our manuscript3.We acknowledge that κ statistics depend on the prevalence of the variable under investigation and we have made this transparent. This limitation becomes relevant when comparing results across multiple studies. However, we use κ to assess which of several variables similarly assessed on the same patients provide sufficient agreement, i.e., we primarily used κ to order lesion types. This implies that the actual value of κ is of minor importance and the above limitation does not alter the conclusion of … Address correspondence to Dr. A.A. Christiansen, Department of Research, King Christian 10th Hospital for Rheumatic Diseases, Toldbodgade 3, 6300 Gråsten, Denmark. E-mail: achristiansen{at}gigtforeningen.dk ER -