Open AccessThe forgotten joint score‐12 is a valid and responsive outcome tool for measuring success following hip arthroscopy for femoroacetabular impingement syndrome
Author(s) -
Robinson Patrick G.,
Rankin C. S.,
Murray I. R.,
Maempel J. F.,
Gaston P.,
Hamilton D. F.
Publication year - 2021
Publication title -
knee surgery, sports traumatology, arthroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.806
H-Index - 125
eISSN - 1433-7347
pISSN - 0942-2056
DOI - 10.1007/s00167-020-06138-7
Subject(s) - hip arthroscopy , femoroacetabular impingement , medicine , construct validity , physical therapy , patient reported outcome , arthroscopy , ceiling effect , surgery , quality of life (healthcare) , patient satisfaction , alternative medicine , nursing , pathology
Purpose The forgotten joint score‐12 (FJS‐12) is an outcome questionnaire designed to evaluate joint awareness. The responsiveness and validity of the English language version of the FJS‐12 in patients undergoing hip arthroscopy for femoroacetabular impingement (FAI) is not known. Methods Consecutive patients undergoing hip arthroscopy for a diagnosis of FAI were prospectively followed up over a 1 year period. Patients completed preoperative and postoperative FJS‐12, EuroQol 5 Dimension (EQ‐5D‐5L), and the 12‐item international hip outcome tool (iHOT‐12). We evaluated construct validity with Spearman correlation coefficients for the FJS‐12, and responsiveness by way of effect size and ceiling effects. Results Forty‐six patients underwent hip arthroscopy, of which 42 (91%) completed post‐operative PROMs at 1 year follow‐up. Construct validity was strong with the iHOT‐12 ( r = 0.87) and also the EQ‐5D‐5L ( r = 0.83). The median postoperative FJS score was 50.2 (IQR 64). The mean change in score for the FJS‐12 was 31 points (SD 31) ( p < 0.001), with an effect size (Cohen’s d ) of 1.16. Preoperatively, three patients scored the lowest possible value resulting in a floor effect of 7.1%. Similarly, only three patients (7.1%) scored the best possible score post‐operatively. Conclusion This is the first evaluation of the joint awareness concept in the English language version of the FJS‐12 following hip arthroscopy for FAI. The FJS‐12 is a valid and responsive tool for the assessment of this cohort of patients. Level of evidence II.