Reliability and responsiveness of the Swedish short Hip-RSI

Tobias Wörner; Mikael Sansone; Anders Stålman; Frida Eek

doi:10.1002/jeo2.12029

Reliability and responsiveness of the Swedish short Hip-RSI

J Exp Orthop. 2024 May 15;11(3):e12029. doi: 10.1002/jeo2.12029. eCollection 2024 Jul.

Authors

Tobias Wörner^{1

2}, Mikael Sansone³, Anders Stålman², Frida Eek¹

Affiliations

¹ Department of Health Sciences Lund University Lund Sweden.
² Department of Molecular Medicine and Surgery, Stockholm Sports Trauma Research Center Karolinska Institutet Stockholm Sweden.
³ Gothenburg Sports Trauma Research Center, Institute of Cinical Sciences, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden.

Abstract

Purpose: The aim of this study was to examine test-retest reliability and responsiveness of the short version (6-item) Hip Return to Sport after Injury (Hip-RSI) scale in patients following hip arthroscopy.

Methods: The study included 100 hip arthroscopy patients responding to a digital survey including the short version (6-item) Hip-RSI, International Hip Outcome Tool (short version) (iHOT-12) and RTS status 3, 6 and 9 months following surgery. The Hip-RSI was administered twice at 3-month follow-up. Test-retest reliability was evaluated using intraclass correlation coefficients. Responsiveness was tested by correlations between changes in Hip-RSI and iHOT-12 scores and by comparing change in Hip-RSI scores of patients who progressed on the return to sport (RTS) continuum (from return to any sport to return to performance) to patients who did not, using independent samples t-tests.

Results: Hip-RSI was found to have excellent test-retest reliability on the individual (intraclass correlation coefficient, ICC [95% confidence interval, CI]: 0.90 [0.83-0.94]) and group level (ICC [95% CI]: 0.95 [0.91-0.97]) with a standard error of measurement of 5.53 and smallest detectable change of 15.3 on the individual and 2.2 on the group level. Hip-RSI was found responsive to change through positive correlations of changes in scores with changes in iHOT-12 scores from 3 to 6 months (r [95% CI]: 0.51 [0.35-0.65]; p < 0.001) and from 3 to 9 months following arthroscopy (r [95% CI]: 0.61 [0.57-0.79); p < 0.001). Further responsiveness was shown by significant mean changes in scores among patients that progressed on the RTS-continuum (3-6 months: 8.6 [95% CI: 3.8- 13.5); 3-9 months: 12.6 [5.6-19.7]).

Conclusion: The short version (6-item) Hip-RSI demonstrated excellent test-retest reliability and responsiveness to change in the evaluation of psychological readiness to RTS following hip arthroscopy.

Level of evidence: Level II.

Keywords: hip arthroscopy; psychological readiness; return to sports.