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Lower plasma amyloid-β (Aβ) 42/Aβ40 ratios were significantly correlated with smaller hippocampus volumes only in the people without human immunodeficiency virus (HIV) (PWoH) who had symptomatic Alzheimer disease (PWoH_AD). Abbreviations: PWH_CI, people with HIV (PWH) with cognitive impairment; PWH_CN, cognitively normal PWH; PWoH_CN, cognitively normal PWoH.
