High relative reliability and responsiveness of the forgotten joint score-12 in patients with femoroacetabular impingement undergoing hip arthroscopic treatment. A prospective survey-based study

Abstract

The forgotten joint score-12 (FJS-12) may be an advantageous questionnaire in young patients with high hip function and a low level of pain. We investigated the reliability and the responsiveness of the FJS-12 in patients with femoroacetabular impingement undergoing hip arthroscopic treatment. Fifty patients were included in the reliability study and 34 patients were included in the responsiveness study. Test–retest reliability was assessed with intraclass correlation coefficient (ICC), standard error of measurement (SEM) and minimal detectable change (MDC). Responsiveness was assessed from testing correlations between the FJS-12 and the Copenhagen Hip and Groin Outcome Score (HAGOS) of the change score, effect size (ES) and standardized response mean (SRM). Floor and ceiling effect were defined as present if the number of patients obtaining the maximum (100) and minimum score (0) exceeded 15%. The relative reliability was high (ICC = 0.9, 95% CI: 0.8–0.9) and the absolute reliability was low (SEM = 11, MDCindividual = 32, MDCgroup = 4.5). The responsiveness was high, and the change score was highly correlated with the subscale ‘pain’ from the HAGOS and moderately correlated with the subscale ‘ADL’. Furthermore, the FJS-12 exceeded or equalled the HAGOS subscales in ES and SRM. Below 15% of the patients scored the maximum or minimum score. The FJS-12 has high reliability, high responsiveness to change and shows no floor or ceiling effect.

Total Hip Arthroplasty: Minimal Clinically Important Difference and Patient Acceptable Symptom State for the Forgotten Joint Score 12

“…An a priori power analysis was performed. With an alpha level of 0.05 (two-tailed), minimum power established at 0.80, and a medium effect size of 0.6 (ES, Cohen’s d ) [ 25 ], 24 participants would be necessary to find a statistically significant effect on the model. Data normality for the FJS-12 was assessed using the Kolmogorov-Smirnov test of normality.…”

The Reliability of Remote Patient-Reported Outcome Measures via Mobile Apps to Replace Outpatient Visits After Rotator Cuff Repair Surgery: Repetitive Test-Retest Comparison Study for 1-Year Follow-up

“…Chahal et al [ 17 ] reported good reliability of PROM for knee joint–specific questionnaires in a test-retest study conducted 6 months after multiligament knee injury. Bramming et al [ 18 ] reported that a PROM (forgotten joint score-12) showed high relative reliability in a test-retest study conducted at 6 months after hip arthroscopic surgery. The differences in follow-ups performed in the first 3 months postsurgery might be due to variability in patient conditions during the acute phase following surgery.…”

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

“…The patients’ outcomes were reviewed at a clinically relevant time point, 1 year following surgery. The only comparable data come from a Dutch language study in patients undergoing hip arthroscopy, where an effect size of 0.6 was reported at 6 month follow-up [ 2 ]. A substantially greater effect size of 1.16 was demonstrated at 1 year.…”

“…Bramming et al reported high relative reliability and responsiveness of the FJS-12 in hip arthroscopy using the Dutch translated version of the score in a Dutch population [ 2 ], but this had a comparatively short follow-up period of 6 months. A previous meta-analysis has shown substantial improvements following hip arthroscopy between 6 month and 1 year follow-up [ 8 ], and therefore, this study may not have captured the clinically relevant recovery period and improvement following surgery.…”