Table 4.

Measures included in the data set.

Age	Age at time of image acquisition (years).
Gender	Gender (M or F)
Education	Years of education
SES	Socioeconomic status as assessed by the Hollingshead Index of Social Position and classified into categories from 1 (highest status) to 5 (lowest status) (Hollingshead, 1957)
MMSE	Mini-Mental State Examination score (range is from 0 [worst] to 30 [best]) (Folstein, Folstein, & McHugh, 1975)
CDR	Clinical Dementia Rating. (0 = no dementia, 0.5 = very mild AD, 1 = mild AD, 2. = moderate AD) (Morris, 1993)
ASF	Atlas scaling factor (unitless). Computed scaling factor that transforms native-space brain and skull to the atlas target (i.e. the determinant of the transform matrix) (Buckner et al., 2004)
eTIV	Estimated total intracranial volume (cm3) (Buckner et al., 2004)
nWBV	Normalized whole brain volume, expressed as a percent of all voxels in the atlas-masked image that are labeled as gray or white matter by the automated tissue segmentation process (Fotenos et al., 2005)