Abstract
BackgroundThe Western Ontario Shoulder Instability index (WOSI) is a questionnaire designed to measure health-related quality of life in patients with shoulder instability. The aim of the current study was to translate the WOSI into Hebrew and assess its psychometric properties.MethodsThe WOSI was translated into Hebrew according to World Health Organization guidelines. Twenty-five patients completed the WOSI and the Disabilities of Arm, Shoulder, and Hand (DASH) questionnaire 2 weeks and 2 months after surgical shoulder stabilization. Internal consistency (Cronbach’s α), criterion validity (Pearson’s correlation coefficient with DASH), responsiveness, and floor and ceiling effects were assessed.ResultsCronbach’s α was 0.88–0.95 for total WOSI (range 0.68–0.95 for different sections). Strong correlation with DASH score (r = 0.76–0.84) indicated good criterion validity. Changes between baseline and follow-up for WOSI and DASH scores were moderately correlated (r = 0.68), suggesting moderate responsiveness. Some items demonstrated floor and ceiling effects, especially at baseline, but no floor or ceiling effects were observed for total WOSI or for the WOSI sections.ConclusionsThe results of the current study demonstrate that the Hebrew version of the WOSI is a valid instrument that can be used to assess disability in patients with shoulder instability. Additional studies are warranted to assess its psychometric properties among various subpopulations.Trial registrationThe study was pre-registered at the ClinicalTrials.gov website, registration number NCT02978365.
Highlights
Anterior shoulder dislocations are the primary cause of shoulder instability (SI), a condition that refers to the inability to maintain the humeral head in the glenoid fossa [1]
Twenty-five patients were included in final analysis
Excellent internal consistency was found for the HWOSI, both at baseline and at follow-up
Summary
Anterior shoulder dislocations are the primary cause of shoulder instability (SI), a condition that refers to the inability to maintain the humeral head in the glenoid fossa [1]. The incidence of primary shoulder dislocation is 8.2 to 23.9 per 100,000 person-years, and its estimated prevalence is 1.7% [2, 3]. Subjective measures include questionnaires, referred to as patient-reported outcome measures (PROMs), that assess patient function and satisfaction [10]. A PROM commonly used to evaluate upper extremity function is the Disabilities of Arm, Shoulder, and Hand questionnaire (DASH) [11]. The DASH can detect and Gottlieb and Springer Journal of Orthopaedic Surgery and Research (2019) 14:245 differentiate small and large changes in disability over time after surgery in patients with a variety of upper-extremity musculoskeletal disorders [12,13,14]. The Western Ontario Shoulder Instability index (WOSI) is a questionnaire designed to measure healthrelated quality of life in patients with shoulder instability. The aim of the current study was to translate the WOSI into Hebrew and assess its psychometric properties
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