Fig. 1

Levels of Alzheimer’s disease (AD) core CSF biomarkers and QC activity in CSF of mild and moderate AD patients compared with control subjects (SMC). Core CSF biomarkers a Aβ38, b Aβ40, c Aβ42, d Tau and e ptau. f QC activity. p values from Kruskal–Wallis statistics, n = 20 per group, post-hoc test results: ns not significant, *p < 0.05, **p < 0.01, ***p < 0.001, outliers marked with patient number