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Article Abstract
Background: Artificial intelligence (AI)-driven analysis of retinal images holds promise for noninvasive, early detection of neurodegenerative disorders. We conducted a prospectively registered systematic review and meta‑analysis to quantify diagnostic accuracy of AI‑assisted retinal imaging across Alzheimer's disease (AD), Parkinson's disease (PD), and related conditions.
Methods: We searched six databases for studies (2010-2024) employing AI/ML models for binary classification of neurodegenerative disease versus healthy controls. Risk of bias was assessed using QUADAS-2. We extracted pooled area under the receiver operating characteristic curve (AUC) with 95% confidence intervals (CIs), heterogeneity statistics, and participant numbers. Certainty of evidence was graded using GRADE criteria.
Results: Our analysis included ten studies (seven on AD, four on PD; 496 patients, 441 patients, and 36,990 healthy controls). The overall pooled AUC was 0.73 (95% CI, 0.69-0.77; I²=78%). Subgroup analyses showed an AUC of 0.72 for AD and 0.70 for PD. QUADAS-2 assessments indicated low-to-moderate risk of bias, with patient selection variability being a key concern. GRADE evaluations showed moderate to high certainty in the evidence.
Conclusions: AI‑assisted retinal imaging demonstrates consistent, moderate accuracy for early detection of AD and PD. Future research should standardize imaging protocols and patient selection criteria, and pursue large-scale, prospective validation.
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| http://dx.doi.org/10.1016/j.pdpdt.2025.104788 | DOI Listing |
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