Confounding Factors Influencing Amyloid Beta Concentration in Cerebrospinal Fluid

Table 2

Correlation matrix for the evaluated A𝛽 assays. The correlation between the levels of A𝛽₄₂ in different assays. The correlation coefficients for the neat and diluted CSF samples are shown in the upper right and lower left part, respectively.

	Innogenetics	Innogenetics	The Genetics	Innogenetics	Innogenetics	MSD
	ELISA (4G8)	ELISA	ELISA	AlzBio3	A𝛽 forms	Triplex
Innogenetics ELISA (4G8)	1	0.94	0.90	0.87	0.69	0.97
Innogenetics ELISA	0.96	1	0.82	0.93	0.81	0.92
The Genetics ELISA	0.93	0.88	1	0.75	0.53	0.87
Innogenetics AlzBio3	0.92	0.94	0.89	1	0.88	0.84
Innogenetics A𝛽 forms	0.78	0.86	0.67	0.86	1	0.66
MSD Triplex	0.98	0.96	0.93	0.93	0.77	1