Simplified Chinese version of the Forgotten Joint Score (FJS) for patients who underwent joint arthroplasty: cross-cultural adaptation and validation

J Orthop Surg Res. 2017 Jan 14;12(1):6. doi: 10.1186/s13018-016-0508-5.


Background: The Forgotten Joint Score (FJS) is a newly developed health-related quality of life (HRQoL) questionnaire designed to evaluate the awareness after total knee arthroplasty (TKA). This study cross-culturally adapted and psychometrically validated a simplified Chinese version of the FJS (SC-FJS).

Methods: Cross-cultural adaptation was performed according to the internationally recognized guidelines. One-hundred and fifty participants who underwent primary TKA were recruited in this study. Cronbach's α and intra-class correlations were used to determine reliability. Construct validity was analyzed by evaluating the correlations between SC-FJS and the Knee Injury and Osteoarthritis Outcome Score (KOOS) and the short form (36) health survey (SF-36).

Results: Each of the 12 items was properly responded and correlated with the total items. SC-FJS had excellent reliability [Cronbach's α = 0.907, intra-class correlation coefficient (ICC) = 0.970, 95% CI 0.959-0.978). Elimination of any one item in all did not result in a value of Cronbach's α of <0.80. SC-FJS had a high correlation with symptoms (0.67, p < 0.001) and pain (0.60, p < 0.001) domains of KOOS and social functioning (0.66, p < 0.001) domain of SF-36, and it also moderately correlated with function in daily living (0.53, p < 0.001) and function in sport and recreation (0.40, p < 0.001) domains of KOOS, and physical subscale of SF-36 (0.49-0.53, p < 0.001) but had a low (r = 0.20) or not significant (p > 0.05) correlation with mental subscale of SF-36.

Conclusions: SC-FJS demonstrated excellent acceptability, internal consistency, reliability, and construct validity, which can be recommended for patients who underwent joint arthroplasty in Mainland China.

Keywords: Arthroplasty; Forgotten Joint Score; Quality of life; Reliability; Validity.

MeSH terms

  • Activities of Daily Living / psychology
  • Aged
  • Arthroplasty, Replacement, Knee* / adverse effects
  • Arthroplasty, Replacement, Knee* / psychology
  • Asians / ethnology*
  • Asians / psychology
  • China / ethnology
  • Cross-Cultural Comparison*
  • Female
  • Health Surveys / standards*
  • Humans
  • Male
  • Middle Aged
  • Pain, Postoperative / diagnosis
  • Pain, Postoperative / ethnology
  • Pain, Postoperative / psychology
  • Pilot Projects
  • Quality of Life / psychology
  • Reproducibility of Results
  • Severity of Illness Index*
  • Surveys and Questionnaires / standards