The application discloses a method for differentiating Late-Life Depression (LLD) and amnestic Mild
Cognitive Impairment (aMCI) based on
plasma metabolomics combined with neural cognitive evaluation. The application detects
metabolite spectrum in the
plasma of the subject by
hydrogen proton magnetic
resonance spectrum
metabolomics technology, screens out Scyllo-
inositol as a key differential marker, and combines with neural
cognitive test scores (especially memory scale scores) to construct a joint diagnosis model. The method can effectively distinguish LLD, aMCI and
healthy control groups, and has high
diagnostic accuracy and specificity. In addition, the method further introduces two-way double-sample Mendelian
Randomization (MR) analysis to verify the causal relationship between Scyllo-
inositol and the risk of
dementia from the genetic point of view, and to strengthen the reliability of Scyllo-
inositol as a biomarker. The application provides a diagnosis method with both
metabolomics and genetic evidence support for early identification, accurate
typing and intervention of high-
risk groups of
senile dementia, and has important clinical application value.