title: Construct Validity and Test Re-Test Reliability of the Forgotten Joint Score.
abstract: Consecutive patients undergoing knee arthroplasty completed questionnaires: FJS, Knee Injury and Osteoarthritis Outcome Score (KOOS) and WOMAC Score (mean 39 months after surgery), and were mailed a repeat questionnaire after 4 to 6 weeks. The test-retest reliability was almost perfect for the FJS (ICC = 0.97), and the FJS subdomains (ICC > 0.8). Convergent construct validity of the FJS was correlated with the KOOS Subscores of Quality of Life (0.63, P = 0.001), Symptom (0.33, P = 0.001), Pain (0.68, P = 0.001) and ADL (0.66, P = 0.001) and the Total WOMAC (0.70, P = 0.001). The FJS demonstrates high test-retest reliability and construct validity compared to the Normalised WOMAC and KOOS Subscales. The FJS does not demonstrate the ceiling effect of the WOMAC or KOOS pain scores so may have greater discriminatory ability following TKR.
authors.affiliation: North Sydney Orthopaedic and Sports Medicine Centre, The Mater Clinic, Suite 2, Wollstonecraft NSW, Australia.
authors.forename: Simon M
authors.initials: SM
authors.lastname: Thompson
authors.affiliation: North Sydney Orthopaedic and Sports Medicine Centre, The Mater Clinic, Suite 2, Wollstonecraft NSW, Australia.
authors.forename: Lucy J
authors.initials: LJ
authors.lastname: Salmon
authors.affiliation: North Sydney Orthopaedic and Sports Medicine Centre, The Mater Clinic, Suite 2, Wollstonecraft NSW, Australia.
authors.forename: Justin M
authors.initials: JM
authors.lastname: Webb
authors.affiliation: North Sydney Orthopaedic and Sports Medicine Centre, The Mater Clinic, Suite 2, Wollstonecraft NSW, Australia.
authors.forename: Leo A
authors.initials: LA
authors.lastname: Pinczewski
authors.affiliation: North Sydney Orthopaedic and Sports Medicine Centre, The Mater Clinic, Suite 2, Wollstonecraft NSW, Australia.
authors.forename: Justin P
authors.initials: JP
authors.lastname: Roe
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D006801:Humans; D007718:Knee Injuries; D007719:Knee Joint / Q000601:surgery; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery; D010146:Pain / Q000601:surgery; D063868:Patient Outcome Assessment; D011788:Quality of Life; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires
keywords: Forgotten Joint Score; arthroplasty; assessment; reliability; validity