Validation study of the Forgotten Joint Score-12 as a universal patient-reported outcome measure

  • Mikio Matsumoto
  • Tomonori BabaEmail author
  • Yasuhiro Homma
  • Hideo Kobayashi
  • Hironori Ochi
  • Takahito Yuasa
  • Henrik Behrend
  • Kazuo Kaneko
Original Article • HIP - ARTHROPLASTY



The Forgotten Joint Score-12 (FJS-12) is for patients to forget their artificial joint and is reportedly a useful patient-reported outcome tool for artificial joints. The purpose of this study was to determine whether the FJS-12 is as useful as the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) or the Japanese Orthopaedic Association Hip Disease Evaluation Questionnaire (JHEQ) in Japan.


All patients who visited our hospital’s hip joint specialists following unilateral THA from August 2013 to July 2014 were evaluated. Medical staff members other than physicians administered three questionnaires. Items evaluated were (1) the reliability of the FJS-12 and (2) correlations between the FJS-12 and the total and subscale scores of the WOMAC or JHEQ.


Of 130 patients, 22 were excluded. Cronbach’s α coefficient was 0.97 for the FJS-12. The FJS-12 showed a significantly lower score than the WOMAC or JHEQ (p < 0.01). The FJS-12 was moderately correlated with the total WOMAC score (r = 0.522) and its subscale scores for “stiffness” (r = 0.401) and “function” (r = 0.539) and was weakly correlated with the score for “pain” (r = 0.289). The FJS-12 was favorably correlated with the total JHEQ score (r = 0.686) and its subscale scores (r = 0.530–0.643).


The FJS-12 was correlated with and showed reliability similar to that of the JHEQ and WOMAC. The FJS-12, which is not affected by culture or lifestyle, may be useful in Japan.


Forgotten Joint Score-12 Patient-reported outcome Total hip arthroplasty WOMAC score JHEQ score 


Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer-Verlag France 2015

Authors and Affiliations

  • Mikio Matsumoto
    • 1
  • Tomonori Baba
    • 1
    Email author
  • Yasuhiro Homma
    • 1
  • Hideo Kobayashi
    • 1
  • Hironori Ochi
    • 1
  • Takahito Yuasa
    • 1
  • Henrik Behrend
    • 2
  • Kazuo Kaneko
    • 1
  1. 1.Department of Orthopedic SurgeryJuntendo University School of MedicineTokyoJapan
  2. 2.Department of Orthopaedic SurgeryKantonsspital St.GallenSt. GallenSwitzerland

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