Fig. 1.

Violin box plots for the distribution of the relative concentrations (pg/mL) of each biomarker among the different biofluids. Bottom and top lines of the boxes correspond to first and third quartiles respectively, and the middle lines refers to the mean value. The density plots represent an estimation that shows the distribution shape of the data and its bottom and top points correspond to the zero and fourth quartiles respectively. Aβ: amyloid beta; t-Tau: total tau; ptau181: hyperphosphorylated tau 181; GFAP: Glial fibrillary acidic protein; NfL: neurofilament light chain