Table 2.

Coefficients of the cubic regression between test results x and λ.

x	a	b	c	d	R2
Aβ1−40/Aβ1−42	0.00015189	−0.010320125	0.154661878	0.69895132	0.9984
Composite score	−1.009861	2.267549089	−2.448933781	1.25118718	0.9942