Table 1.

Cut-off values of CSF biomarkers applied at our laboratory [18,23].

CSF Biomarker	Cut-off Values *
total tau protein (τT)	<376 pg/mL
tau phosphorylated at threonine-181 (τP-181)	<57 pg/mL
amyloid-β peptide with 42 amino acids (Aβ42)	>580 pg/mL
Aβ42/Aβ40	>0.067
τP-181/τT	>0.165
TDP-43	<3.73 pg/mL
TDP-43 × τΤ/τP-181	<20.5

* From Paraskevas et al., 2017; Bourbouli et al., 2017.