Table 2.

Association Between CSF Aβ1–42/ CSF P-Tau_181P Mixture Model Classification and Diagnostic Follow-up Broken Down by Diagnosis at Baseline

Diagnosis at Baseline	Mixture Model Classification	Latest Follow-up Diagnosis, No. (%)				P Value for Associationa
		Normal	MCI	AD
Normal	AD	37 (91)	3 (8)	0		.13
	Healthy	71 (99)	1 (1)	0
MCI	AD	2 (1)	100 (73)	35 (26)		.04
	Healthy	3 (6)	42 (82)	6 (12)
AD	AD	0	0	88 (100)		>.99
	Healthy	0	0	10 (100)

Abbreviations: AD, Alzheimer disease; CSF Aβ1–42, cerebrospinal fluid–derived β-amyloid protein 1–42; CSF P-Tau_181P, cerebrospinal fluid–derived phosphorylated tau_181P; MCI, mild cognitive impairment.

^aFisher exact test.