Table 5.

Selected features for the classification of naMCI vs. aMCI.

Task	Baseline feature	Frequency	pa	Wave-2 feature	Frequency	pa	Longitudinal feature	Frequency	pa
naMCI vs. aMCI	Right rostral middle frontal thickness	2,643	<0.001	Right rostral anterior cingulate volume	2,754	<0.001	Right rostral anterior cingulate volume	2,598	<0.001
	Right rostral anterior cingulate volume	2,538	<0.001	Right frontal pole thickness	2,634	<0.001	Right rostral middle frontal thickness	2,502	<0.001
	Right pericalcarine thickness	2,241	0.001	Right rostral middle frontal thickness	2,190	<0.001	Right frontal pole thickness	2,478	<0.001
	Right frontal pole thickness	1,815	<0.001	Right pericalcarine thickness	1,551	0.005	Right pericalcarine thickness	1,830	0.002
	Right g-sic	1,539	0.004	Left transverse temporal volumec	1,131	0.028	Right lateral occipital thickness	1,062	0.001
	Right lateral occipital thicknessc	1,023	< 0.001	Right wmh volume of frontalc	1,071	0.122	Right entorhinal volumeb*	1,029	0.010
	Right transverse temporal thicknessc	750	0.014	Left rostral middle frontal volumec	813	0.037	Left transverse temporal thickness	867	0.009
	Left inferior temporal thicknessc	687	< 0.001	Right insula thicknessc	678	0.037	Left inferior temporal thickness	666	0.001
	Right parsorbitalis thicknessc	666	0.002	Right frontal pole volumec	573	0.054	Left precentral thickness*	639	0.001
	Right transverse temporal thicknessc	480	0.011	Right sulcal width of superior temporalc	552	0.026	Right g-SI	591	0.011

A feature measured at baseline, wave-2 or longitudinally is defined as baseline feature, wave-2 feature or longitudinal feature, respectively.

The first 10 most frequently selected features and their selection frequencies are listed. The maximum possible selection frequency of each feature is 3,000. The features with selection frequencies above 1500 are in bold. Key: wave-2, 2-year follow-up; aMCI, amnestic MCI; naMCI, non-amnestic MCI.

^aResults for comparisons of positive subjects and negative subjects using t-tests.

^bChange measurement, the rest longitudinal features are mean measurements.

^cFeatures that were selected at a single time point (either at baseline or wave-2).

^*Features that were selected only in longitudinal case.