Affiliations: Occupational Health Department, Hospital Center, Chalon sur Saône, France
Correspondence:
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Address for correspondence: Dr J.-B. Henrotin, Centre Hospitalier William Morey, 4 rue du Capitaine Drillien, Chalon-sur-Saône 71100, France. E-mail: [email protected].
Abstract: BACKGROUND:The Oxford shoulder score (OSS) questionnaire for measuring patient perception of shoulder disability, has not tested specifically in a non-surgical population and no study has assessed the OSS with modern psychometrics based on Rasch model (RM). OBJECTIVE:To assess the psychometric properties of the OSS using RM among health-care workers with shoulder disorders and to verify its interest in a non-surgical population. METHODS:In an occupational health department of a French hospital center, a retrospective review was performed of the medical records from June 2019 to October 2020. Responses to 110 questionnaires were examined from 55 subjects (97% of women). A polytomous Rasch model based on the Partial Credit Model was used. RESULTS:Overall fit was satisfactory, the reliability coefficient was high and an ascending order was observed with the 5 categories of the scale. Analysis of the residuals supports unidimensionality and the local independence assumption. Item performance remained stable across the subgroup examined (DIF measures). Scale to-sample targeting indicated a substantial floor effect, and the mildest impairments were not well discriminated. CONCLUSIONS:OSS presents good psychometric qualities. However, it does not clearly discriminate subjects presenting the lowest levels of impairment. Its use in a non-surgical population is questionable.
Keywords: Shoulder, patient health questionnaire, psychometrics, health personnel, hospitals, occupational health
DOI: 10.3233/WOR-205334
Journal: Work, vol. 72, no. 4, pp. 1239-1248, 2022
