. Author manuscript; available in PMC: 2014 Dec 11.

Published in final edited form as: Int J Geriatr Psychiatry. 2012 Mar 1;27(10):1017–1027. doi: 10.1002/gps.2816

Table 2.

Diagnostic Group and Memory Domain Z Scores of the FDDNP Clusters.

	FDDNP Signal Clusters
Diagnostic Group	No. of subjects per cluster
	LG	HF/PA	HT/PC
Normal cognition	19	7	1
MCI	5	17	7
MCI-A	4	7	2
MCI-A+	1	10	5
Mean (SD) Domain Z Scores for Clusters^*
	LG	HF/PA	HT/PC
Memory^†	.59 (.70)	−.33 (.81)	−.43 (.56)
Executive^‡	.48 (.49)	−.42 (1.04)	−.28(1.02)

LG = Low Global; HF/PA = High frontal/parietal and medial temporal signal with intermediate signal in temporal and posterior cingulate; HT/PC = High lateral temporal/posterior cingulate. MCI-A = single domain amnestic mild cognitive impairment; MCI-A+ = multiple domain amnestic mild cognitive impairment.

Lower (more negative) Z scores represent poorer performances.

^†

Memory Domain: [F(2,46) = 8.07, p = .001; LG vs HF/PA: t(46) = 3.82, p = .0004; LG vs HT/PC: t(46) = 2.39, p = .02];

^‡

Executive Domain [F(2,46) = 5.25, p = .01; LG vs HF/PA: t(46) = 3.24, p = .002]