Validation of the Dutch version of the Hip Outcome Score; validity, reliability, and responsiveness in patients with femoroacetabular impingement syndrome

Abstract

Due to a lack of a validated Dutch version of the Hip Outcome Score (HOS) considering functional outcome after hip arthroscopy for femoroacetabular impingement syndrome, we validated the Dutch version of the HOS (HOS-NL) in patients with femoroacetabular impingement syndrome for reliability, internal consistency, construct- and content validity. Furthermore, the smallest detectable change (SDC) and minimal clinically important difference (MCID) were determined. All consecutive patients scheduled for an arthroscopic procedure for FAIS were selected. Five questionnaires covering groin and hip pain were filled in at three moments in time (two pre-operatively with a maximum two-week interval and 6 months postoperatively). Main endpoints were reliability (test re-test, SDC), internal consistency (Cronbach alpha), construct validity (construct validity was considered sufficient if a least 75% of a-priori made hypotheses were confirmed), content validity (floor and ceiling effects) and responsiveness (MCID). The intraclass correlation coefficient (ICC) was 0.86 for the HOS ADL-NL and 0.81 for the HOS Sports-NL. SDC for the HOS ADL-NL was 21 and for the HOS Sports-NL 29 Cronbach alpha score was 0.882 for HOS ADL-NL and 0.792 for HOS Sports-NL. Construct validity was considered sufficient since 91% of the hypotheses were confirmed. No floor effects were determined. A small ceiling effect was determined for the HOS AD-NL postoperatively. The MCID for HOS ADL-NL and HOS Sports-NL were 14 and 11.0, respectively. The HOS-NL is a reliable and valid patient reported outcome measure for measuring physical function and outcome in active and young patients with femoroacetabular impingement syndrome.

RETRACTED ARTICLE: Efficacy and safety of arthroscopy in femoroacetabular impingement syndrome: a systematic review and meta-analysis of randomized clinical trials

“…For instance, in the evaluation of time at 12 months, the effect of the intervention in the arthroscopy group was observed 2 months earlier than in the physiotherapy group. Griffin et al 26 reported a difference of 85 days, almost 3 months 19 . This difference in treatment initiation time could have led to differences in the progression of the condition, severity of symptoms, and efficacy of interventions.…”

“…The minimal clinically important difference (MCID) was included in the outcomes, based on previous studies that analyzed these scales. The MCID for iHOT-33, HOS ADL, and HOS S were six, 14, and 11 points, respectively 18 , 19 . We then assessed whether MCID was achieved using the confidence intervals of the mean difference between the experimental and control groups (yes/no).…”

Efficacy and safety of arthroscopy in femoroacetabular impingement syndrome: A systematic review and meta-analysis

“…Minimally clinical important difference (MCID) was included in the outcomes based on previous studies analyzing these scales. The MCID for iHOT-33, HOS ADL, and HOS S were six, 14, and 11 points, respectively 11,12 . Then it was assessed whether MCID was achieved through the con dence intervals of the mean difference between experimental and control groups (yes/no).…”