Forgotten Joint Score - 12 (knee)

Clinical intent

The FJS Knee was designed to assess patient outcome in patients undergoing conservative or operative treatment of the knee. This questionnaire shows its strengths in patients with a good level of knee function and a low pain level. It has been designed specifically to reduce ceiling effects commonly associated with many PRO measures in this patient group, e.g. when assessing short- to mid-term results in total knee arthroplasty patients.

Calculation

Summing the raw scores gives you a score between 12 and 60. The raw score is linearly transformed to a 0-100 scale with the following formula 100 - (raw_score - 12)/48*100)

Clinical interpretation

The total score ranges from 0 to 100; a high score indicates good outcome.

References

[1] Joint awareness after unicompartmental knee arthroplasty and total knee arthroplasty: a systematic review and meta-analysis of cohort studies. Tripathy SK, Varghese P, Srinivasan A, Goyal T, Purudappa PP, Sen RK, Chandrappa MH. Knee Surg Sports Traumatol Arthrosc. 2020 Oct 19. [2] Evaluation of joint awareness after acetabular fracture: Validation of the Forgotten Joint Score according to the COSMIN checklist protocol. Freigang V, Weber J, Mueller K, Pfeifer C, Worlicek M, Alt V, Baumann FM. World J Orthop. 2021 Feb 18;12(2):69-81.