4.4 Article

Reliability and Validity of the German Version of the AO Spine Patient Reported Outcome Spine Trauma Questionnaire

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GLOBAL SPINE JOURNAL
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SAGE PUBLICATIONS LTD
DOI: 10.1177/21925682231156124

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outcome instrument; AO spine PROST; patient perspective; spine trauma

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This study aimed to translate and adapt the AO Spine PROST questionnaire into German and test its psychometric properties among German-speaking Swiss spine trauma patients. The results showed that the German version of the AO Spine PROST questionnaire demonstrated very good validity and reliability.
Study Design A single-center validation study. Objective To translate and cross-culturally adapt the AO Spine PROST (Patient Reported Outcome Spine Trauma) into German, and to test its psychometric properties among German-speaking Swiss spine trauma patients. Methods Patients were recruited from a level-1 Swiss trauma center. Next to the AO Spine PROST, the EQ-5D-3L questionnaire was used for concurrent validity. Questionnaires were filled out at two-time points for test-retest reliability. Patient characteristics were analyzed using descriptive statistics. For content validity, floor, and ceiling effects, as well as any irrelevant and missing questions were analyzed. Construct validity of the AO Spine PROST questionnaire to the EQ-5D-3L was tested using Spearman correlation tests. Results The AOSpine PROST was translated and adapted into German using established guidelines. We included 179 patients. The floor effect for all items was well within the optimal range (below 15%), while the ceiling effect of seven items was within the optimal range. None of the items displayed a problematic floor or ceiling effect. The overall test-retest reliability of the total PROST score was excellent, with an ICC of .83 (95% CI .69-.91). The Spearman correlation coefficient between the total PROST summary score and EQ-5D-3 L was rho = .63. Conclusions The German version of the AO Spine PROST questionnaire demonstrated very good validity and reliability results.

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