Table 5.

Group classifications by hippocampal volume and fractional anisotropy of posterior cingulate

Classification	Factors	Sensitivity (%)	Specificity (%)	Accuracy (%)	p Value*	AUC	p Value†
MCI vs CN	Total HV	55 ± 8	70 ± 5	63 ± 3	0.1	0.67 ± 0.02
	TotalHV+LeftPC-FA	69 ± 3	78 ± 2	74 ± 2	0.02	0.78 ± 0.02	<0.001
AD vs CN	Total HV	75 ± 3	81 ± 3	78 ± 1	0.007	0.85 ± 0.01
	TotalHV+LeftPC-FA	88 ± 1	94 ± 2	91 ± 1	<0.001	0.98 ± 0.002	<0.001

^*From logistic regression.

^†From a Wilcoxon signed rank test, comparing two areas under the curves (AUC).

MCI = mild cognitive impairment; CN = cognitive normal; HV = hippocampal volume; left PC-FA = FA of the left posterior cingulate; AD = Alzheimer disease.