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Retinal Imaging and Analysis · Journal article
Journal of Clinical Medicine Research · July 1, 2026
Early or partial results. Treat as a signal, not a conclusion.
In 129,279 dementia-free participants aged ≥50 years, retinal artery occlusion was not significantly associated with incident all-cause dementia after propensity-score matching (HR 1.33, 95% CI 0.72–2.47), replicating a null European finding in a diverse US cohort. The study was substantially underpowered for vascular dementia subtype, and prespecified negative controls revealed pathway-specific detection bias that did not fully explain the vascular dementia estimate.
Prospective cohort study with 1:5 propensity-score matching. All of Us Research Program participants aged ≥50 years free of prevalent dementia; study cohort 129,279; RAO exposed 339 (strict definition by SNOMED coding).. Intervention: Retinal artery occlusion (strict, defined by seven verified SNOMED concept identifiers). Compared with: No retinal artery occlusion. n = 129,279. All of Us Research Program, United States.
All-cause dementia: matched HR 1.33 (95% CI 0.72–2.47) with 10 exposed events among 1,506 incident dementia events Vascular dementia: matched HR 1.81 (95% CI 0.66–4.94) with 3 exposed events, imprecise and underpowered Cataract (same-pathway ophthalmology control) was elevated (HR 1.87, 95% CI 1.45–2.42), indicating detection bias
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Clinicians should not assume retinal artery occlusion independently increases dementia risk in the general population; however, the study cannot exclude meaningful vascular dementia effects due to small exposed event counts. The detection of pathway-specific bias warrants caution in interpreting similar observational associations derived from administrative claims or EHR coding.
Null finding for all-cause dementia in a large observational cohort with prespecified negative controls, but underpowered for vascular dementia subtype and unable to fully explain residual associations; insufficient to change practice.
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Quoted from the source exactly as published.
Clinicians should not assume retinal artery occlusion independently increases dementia risk in the general population; however, the study cannot exclude meaningful vascular dementia effects due to small exposed event counts. The detection of pathway-specific bias warrants caution in interpreting similar observational associations derived from administrative claims or EHR coding.
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Background: Retinal artery occlusion (RAO) shares vascular pathophysiology with cerebrovascular disease, and its relationship to incident dementia remains unsettled. Reported associations may reflect shared vascular pathology, differential ascertainment along the intensive workup pathways that RAO patients enter, or both. No prior study has calibrated RAO–dementia estimates against prespecified negative-control outcomes spanning distinct ascertainment pathways. Methods: Among 129,279 All of Us participants aged 50 years or older and free of prevalent dementia (controlled-tier release R2024Q3R9, OMOP common data model), strict RAO was defined by seven verified SNOMED concept identifiers (n = 339). Incident dementia required two or more codes at least 30 days apart (Wilkinson algorithm), with prespecified vascular and Alzheimer subtypes. Cox models used age as timescale with left truncation and time-varying exposure; 1:5 propensity-score matching was the primary confounder-adjusted analysis. Cataract, benign paroxysmal positional vertigo (BPPV), and inguinal hernia were prespecified negative controls for ophthalmology, neurology, and general-contact pathways. Results: There were 1,506 incident dementia events. RAO was not associated with all-cause dementia (unmatched hazard ratio (HR) 0.81, 95% confidence interval (CI) 0.40–1.64; matched HR 1.33, 95% CI 0.72–2.47; 10 exposed events). The vascular dementia estimate remained elevated but imprecise (unmatched HR 1.93, 95% CI 1.02–3.66; matched HR 1.81, 95% CI 0.66–4.94; 3 exposed events). Cataract was elevated (HR 1.87, 95% CI 1.45–2.42), whereas BPPV (HR 1.27, 95% CI 0.90–1.79) and hernia (HR 1.10, 95% CI 0.68–1.78) were not. Conclusions: We found no evidence that RAO is independently associated with incident dementia, replicating a large European null finding in a diverse United States cohort. The cohort was underpowered to exclude clinically meaningful effects, particularly for vascular dementia. Detection bias in this dataset was demonstrably pathway-specific, but same-pathway calibration accounts for only part of the residual vascular dementia estimate.
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