Abstract
PurposeThe 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.MethodsConsecutive 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.ResultsForty-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.ConclusionThis 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 evidenceII.
Highlights
Hip arthroscopy has been shown to be an effective treatment for the management of femoroacetabular impingement (FAI) [5, 15]
The current patient reported outcome measures (PROMs) used to assess the results of hip arthroscopy are an improvement on previous generic health-related outcome measures or outcome measures designed for hip arthroplasty
They have been shown in some studies to have satisfactory responsiveness and validity, a recent review using Consensus-based Standards for the selection of health Measurement Instruments (COSMIN) guidelines could not recommend the use of the Hip Disability and Osteoarthritis Outcome Score (HOOS), Hip Sports Activity Score (HSAS), modified Harris Hip Score, Non-Arthroplasty Hip Score (NAHS), the Super Simple Hip Score for Younger Patients (SUSHI), and Western Ontario and McMaster Universities Arthritis Index
Summary
Hip arthroscopy has been shown to be an effective treatment for the management of femoroacetabular impingement (FAI) [5, 15]. The success of such interventions needs to be assessed with appropriate tools that are valid and responsive to evaluate change following the intervention. The current patient reported outcome measures (PROMs) used to assess the results of hip arthroscopy are an improvement on previous generic health-related outcome measures or outcome measures designed for hip arthroplasty They have been shown in some studies to have satisfactory responsiveness and validity, a recent review using Consensus-based Standards for the selection of health Measurement Instruments (COSMIN) guidelines could not recommend the use of the Hip Disability and Osteoarthritis Outcome Score (HOOS), Hip Sports Activity Score (HSAS), modified Harris Hip Score (mHHS), Non-Arthroplasty Hip Score (NAHS), the Super Simple Hip Score for Younger Patients (SUSHI), and Western Ontario and McMaster Universities Arthritis Index. There were concerns regarding the ceiling effect present for high performing groups, young males [18]
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