The forgotten joint score-12 is a valid and responsive outcome tool for measuring success following hip arthroscopy for femoroacetabular impingement syndrome

Robinson, Patrick G.; Rankin, C. S.; Murray, I. R.; Maempel, J. F.; Gaston, P.; Hamilton, D. F.

Abstract

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 

• Journal Article Type: Article
• Acceptance Date: Jun 26, 2020
• Online Publication Date: Jul 20, 2020
• Publication Date: 2021-05
• Deposit Date: Nov 9, 2020
• Publicly Available Date: Nov 10, 2020
• Journal: Knee Surgery, Sports Traumatology, Arthroscopy
• Print ISSN: 0942-2056
• Electronic ISSN: 1433-7347
• Publisher: Springer
• Peer Reviewed: Peer Reviewed
• Volume: 29
• Article Number: 1378-1384 (2021)
• DOI: https://doi.org/10.1007/s00167-020-06138-7
• Keywords: Hip, Psychometric, FJS-12, Ceiling, FAI
• Public URL: http://researchrepository.napier.ac.uk/Output/2699659