Document Type
Article
Publication Date
11-13-2025
Abstract
Introduction The utility of brain MRI in dementia diagnosis offers critical insights into structural brain changes, such as hippocampal and thalamic atrophy, which are hallmark features of Alzheimer's disease and Alzheimer's disease-related dementias. However, its use, especially in low- and middle-income countries (LMICs), is affected by limited accessibility. This protocol outlines a systematic review and meta-analysis to assess the diagnostic utility, feasibility and challenges of integrating brain MRI for dementia diagnosis in LMICs. Methods and analysis The review follows Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols with a priori eligibility criteria and is registered in PROSPERO. Searches (from inception to September 2025) will be run in MEDLINE/PubMed, EMBASE, Web of Science and PsycINFO, with supplementary bibliography screening. Adults ≥50 years in LMIC settings undergoing brain MRI for dementia evaluation will be eligible. Data will be synthesised narratively and, where appropriate, via random-effects meta-analysis with planned subgroup analyses by MRI approach (qualitative vs quantitative), magnet strength, sequence availability and reference standard. Screening and data extraction are planned for 1 November to 30 December 2025. Ethics and dissemination Ethical approval was obtained from the Makerere University School of Medicine Research and Ethics Committee (Mak-SOMREC; Ref Mak-SOMREC-2022-337). For verification, contact the SOMREC Administrator at rresearch9@gmail.com. Departmental contact: Dr Geoffrey Erem, Head, Department of Radiology, Makerere University College of Health Sciences (dreremgeoffrey@gmail.com). Only published data will be used, with no new patient contact. Findings will be disseminated via peer-reviewed publication, conference presentations and policy briefs (and, where feasible, mainstream media) to inform clinical practice and training in LMICs. PROSPERO registration number CRD42024510241.
Language
English
Publication Title
BMJ Open
Grant
D43NS118560
Rights
© 2025 Author(s) (or their employer(s)). This is an open access work distributed under the terms of the Creative Commons Attribution-Non-Commercial (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Recommended Citation
Nassanga R, Nakasujja N, Jones SE, et al Brain MRI for the diagnosis of dementia in low- and middle-income countries: a systematic review and meta-analysis protocol of diagnostic utility and imaging findings. BMJ Open 2025;15:e108417. doi: 10.1136/bmjopen-2025-108417
Manuscript Version
Final Publisher Version