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- W4380887775 abstract "Abstract Background Episodic memory decline is one of the earliest cognitive indicators in Alzheimer’s disease (AD) with impairment in memory in older adults an important indicator of incipient AD. Optometry has potential for population based, point‐of‐care screening as retinal biomarkers can detect both symptomatic and preclinical AD. Here, we aimed to develop and optimize a test of episodic memory for use in clinical optometry/ophthalmology settings alongside retinal imaging methods to detect both preclinical and early symptomatic AD. Method 30 cognitively normal (CN) older adults (55‐81 years; 68.5±7) from the Atlas of Retinal Imaging in Alzheimer’s Study (ARIAS) completed the Snellen Memory Test (SMT). Participants completed a a Snellen Eye Chart for three learning trials of 10 seconds exposures, followed by immediate free recall. After a 20‐minute delay, participants completed delayed free recall in which they were asked to recall as many of the letters as they had been shown. This was followed by a recognition test in which participants viewed a mock chart identifying the correct letters and if they were in the correct location as the original chart. Result An intraclass correlation coefficient was calculated to determine the inter‐rater reliability among three raters for 10 randomly selected administrations. Overall results indicated good reliability with a mean coefficient of 0.87 (95% CI: 0.71‐1.03). Convergent and divergent validity for the 30 participants was assessed by comparing SMT performance to RBANS indices and the Free and Cued Selective Reminding Test (FCSRT). The SMT significantly correlated with the RBANS Immediate Memory Index (r = 0.38‐0.52), Language Index (r = 0.39‐0.51), and Attention Index (r = 0.39‐0.46) as well as with selective reminding trial 1 and 2 (r = 0.45‐0.78), and free and cued recall for trial 3 (r = 0.45‐0.47). Conclusion The SMT has potential as an episodic memory test that could be used for point of care detection of preclinical AD. Future work will continue to validate the SMT against reference standard neuropsychological assessments of episodic memory and against AD retinal imaging biomarkers." @default.
- W4380887775 created "2023-06-17" @default.
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- W4380887775 date "2023-06-01" @default.
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- W4380887775 title "The reliability and validity of the snellen memory test for point‐of‐care detection of Alzheimer’s risk in cognitively unimpaired older adults" @default.
- W4380887775 doi "https://doi.org/10.1002/alz.067993" @default.
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