159 / 225
DOS Kongressen 2017 ·
159
High relative reliability and responsiveness of the
forgotten joint score-12 in patientswith femoroac-
etabular impingement undergoing hip arthroscopic
treatment. A prospective survey-based study.
Birgitte Bramming, Signe Kierkegaard, Bent Lund , Stig S. Jakobsen, Inger Mech-
lenburg
Department of Sports Science and Clinical Biomechanics, Faculty of Health Sci-
ences, University of Southern Denmark; Department of Orthopaedic Surgery,
Horsens Regional Hospital; Department of Orthopaedic Surgery, Horsens Re-
gional Hospital; Department of Orthopaedic Surgery, Aarhus University Hospi-
tal; Department of Orthopaedic Surgery, Aarhus University Hospital
Background:
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.
Purpose / Aim of Study:
We investigated the reliability and the responsive-
ness of the FJS-12 in patients with femoroacetabular impingement (FAI) under-
going hip arthroscopic treatment.
Materials and Methods:
50 patients were included in the reliability study and
34 patients were included in the responsiveness study. Test-retest reliability
was assessed with intra class 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 Copen-
hagen Hip and Groin Outcome Score (HAGOS) of the change score, effect size
(ES) and standardized response mean (SRM). Floor and ceiling effect was de-
fined as present if the amount of patients obtaining the maximum (100) and
minimum score (0) exceeded 15%.
Findings / Results:
The relative reliability was high (ICC = 0.9, 95% CI: 0.8-
0.9) and the absolute reliability was low (SEM = 11, MDCindividual = 32, MD-
Cgroup = 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 HA-
GOS subscales in ES and SRM. Below 15% of the patients scored the maximum
or minimum score.
Conclusions:
The FJS-12 has high reliability, high responsiveness to change
and shows no floor or ceiling effect.
No conflicts of interest reported
111.