Translation and validation of a Hebrew version of the Western Ontario Shoulder Instability index
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(2019) 14:245
RESEARCH ARTICLE
Open Access
Translation and validation of a Hebrew version of the Western Ontario Shoulder Instability index Uri Gottlieb1,2*
and Shmuel Springer2
Abstract Background: 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. Methods: The 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. Results: Cronbach’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. Conclusions: The 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 registration: The study was pre-registered at the ClinicalTrials.gov website, registration number NCT02978365. Keywords: Evaluation, Shoulder instability, Quality of life, Self-administered questionnaire, Patient-reported outcome measures
Introduction 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]. About two thirds of shoulder dislocations will evolve into SI within five years [4]. Recurrent dislocations are also common, affecting 59–96% of youth (< 20 years old) and 40–74% of adults (20–40 years old) after primary dislocation [5]. In patients with SI, the ability to participate in sports-related activities is * Correspondence: [email protected] 1 Israel Defense Forces, Medical Corps, Ramat-Gan, Israel 2 Department of Physical Therapy, Ariel University, 40700 Ariel, Israel
often inhibited, resulting in decreased quality of life [4]. Due to high recurrence rates and unsatisfactory outcomes after non-operative rehabilitation [6, 7], more than 60% of patients choose surgical treatment [8]. Results of either conservative or surgical treatment should be evaluated objectively and subjectively. Objective evaluati
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