Table 1. Classification results with current diagnostic.

Source	Diagnostic variable	Class	Class description
ADNI	dxbl	CN	Control normal at baseline
		LMCI	Late MCI at baseline
		AD	Early probable AD at baseline
	dxage	NL	Subjects diagnosed as stable normal at current visitation
		NL to MCI	Subjects diagnosed as MCI at current visit who previously were NL
		NL to Dementia	Subjects diagnosed as dementia due to AD at current visit who previously were NL
		MCI	Subjects diagnosed as stable MCI at current visit who previously were also MCI
		MCI to Dementia	Subjects diagnosed as dementia due to AD at current visit who previously were MCI
		Dementia	Subjects diagnosed as stable dementia due to AD at current visit who previously were also MCI
Our study	dxlast	sHC	Subjects labelled as HC who remained like HC in all follow-up visits (who did not become MCI or AD)
		sMCI	the MCI subject who did not become AD
		cMCI	Subjects initially labelled as HC who subsequently have converted to MCI
		sAD	Subjects who remained like probable or possible AD all the follow-up visits
		cAD	Subjects labelled as HC or MCI who subsequently have converted to probable or possible AD
	dxcsf	normal-HCcsf	sHC subjects with normal CSF profile
		abnormal-HCcsf	sHC subjects with abnormal CSF profile
		normal-MCIcsf	sMCI and cMCI subjects with normal CSF profile
		abnormal-MCIcsf	sMCI and cMCI subjects with abnormal CSF profile
		normal-ADcsf	sAD and cAD subjects with normal CSF profile
		abnormal-ADcsf	sAD and cAD subjects with abnormal CSF profile