ArticleBMJ open2026
Translation, cross-cultural adaptation and psychometric validation study of health instruments in Bangla: protocol for a systematic review of adherence to international standards.
Article in BMJ open, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
introductionTo preserve the validity and reliability of health instruments like patient-reported outcome measures across linguistic and cultural contexts, translation, cross-cultural adaptation and psychometric validation must be conducted using standardised, rigorous methodologies. Although international standards proposed by the International Society for Pharmacoeconomics and Outcomes Research (ISPOR) and the COnsensus-based Standards for the selection of health Measurement INstruments (COSMIN) are available, adherence to these guidelines in Bangla-language instrument studies has not been systematically evaluated. This systematic review aims to identify, synthesise and critically appraise Bangla-language translation, cross-cultural adaptation and psychometric validation studies of health instruments for adherence to recommended methodological approaches, translation and cross-cultural adaptation guidelines and psychometric properties. METHODS AND ANALYSIS: In this study, we will search three databases, including Ovid MEDLINE, PubMed and EMBASE via Ovid, from 1 February 2026 to 1 March 2026 to retrieve published articles on translation, adaptation and psychometric validation of health-related instruments into Bangla. Two reviewers will independently conduct title and abstract screening, full-text eligibility assessment, data extraction, evaluation of translation and cross-cultural adaptation quality and assessment of psychometric properties. The certainty of evidence will be graded. Disagreements will be resolved by consensus, with the consultation of a third reviewer when necessary. Methodological quality and psychometric properties will be assessed based on the COSMIN Risk of Bias (RoB) checklist and COSMIN standards. Evaluation of translation and cross-cultural adaptation will be based on the extended ISPOR guideline. COSMIN-Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach will be used to rate the certainty of evidence. ETHICS AND DISSEMINATION: This study is a systematic review protocol, exclusively on published literature and publicly available data, and does not involve direct interaction with human participants or the collection of individual participant-level data. Therefore, ethical approval is not applicable. We expect to share our findings through national and/or international platforms. Moreover, the results will be published in a peer-reviewed journal. We anticipate that the result of this study will contribute to recommending a standardised roadmap for researchers, especially for conducting translation, validation and cross-cultural adaptation studies of health-related instruments in Bangla. PROSPERO REGISTRATION NUMBER: CRD420251250949.
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