Fig. 1From: Combination of gut microbiota and plasma amyloid-β as a potential index for identifying preclinical Alzheimer’s disease: a cross-sectional analysis from the SILCODE studyPlasma Aβ levels for CN− and CN+ participants. Scatter plot presented mean with range. No significant difference was observed in plasma Aβ40 (A), whereas there were significant differences in plasma Aβ42 (B) and Aβ42/Aβ40 (C) between CN− and CN+. *p < 0.05; **p < 0.01. Aβ amyloid-β; CN−, amyloid-β-negative cognitively normal participants; CN+, amyloid-β-positive cognitively normal participantsBack to article page