Scatter plots of the correlations between CSF CysC and CSF Αβ40 and Αβ42 levels.

<p>(A) (C) (D) The CSF CysC levels were positively correlated with CSF Αβ40 levels in AD (r = 0.312, p = 0.026), AF-GP (r = 0.441, p = 0.003) and normal control (r = 0.388, p = 0.034) subjects. (E) (G) (H) The CSF CysC levels were positively correlated with CSF Αβ42 levels in AD (r = 0.306, p = 0.029), AF-GP (r = 0.657, p<0.001) and normal control (r = 0.507, p = 0.004) subjects. (B) (F) No significant correlations were found between CSF CysC and CSF Αβ40 or Αβ42 in patients with DLB (r = 0.021, p = 0.919, and r = 0.037, p = 0.859, respectively). The correlations of the measured values were examined using the Pearson correlation coefficient. Abbreviations: CysC, cystatin C; Αβ, amyloid-β protein; AD, Alzheimer's disease; DLB, dementia with Lewy body; AF-GP, the atrophic form of general paresis; NC, normal control.