The Dutch version of the Forgotten Joint Score: test-retesting reliability and validation


Published online: Mar 27 2016

Marwan B. SHADID, Nick S. VINKEN, Louis N. MARTING, Nienke WOLTERBEEK

From the department of Orthopaedic Surgery St. Antonius Hospital Nieuwegein, The Netherlands

Abstract

The aim of this study was to translate the Forgotten Joint Score (FJS) into the Dutch language. This Questionnaire was tested for internal consistency (Cronbach's alpha) and test-retest reliability (intraclass correlation coefficients (ICC)). 159 patients were included in this study ; 74 with a total hip arthroplasty (THA) and 85 with a total knee arthroplasty (TKA). The FJS showed a high internal consistency (Cronbach's alpha = 0.957 ; ICC = 0.943). The FJS showed a significant correlation (r = 0.751) with the WOMAC and low ceiling effects (3.1%). This study proved the Dutch FJS to be highly discriminative in patients treated with a THA or TKA. This makes the FJS a reliable patient related outcome measurement, measuring a new dimension in arthroplasty : the ability to forget an artificial joint in everyday life.