. Author manuscript; available in PMC: 2012 Sep 21.

Published in final edited form as: J Alzheimers Dis. 2012 Jan 1;31(0):S59–S74. doi: 10.3233/JAD-2012-120292

Table 3a.

Group comparisons of brain volume indices by cognitive status

	CN, n = 29 mean (sd)	MCI, n = 16 mean (sd)	t	p	Cohen’s d
Normalized whole brain gray matter	0.434 (0.028)	0.426 (0.026)	0.93	0.36	0.30
Normalized whole brain white matter	0.342 (0.026)	0.345 (0.025)	0.39	0.70	0.12
Normalized MTL volume^*	0.580 (0.085)	0.521 (0.075)	2.34	0.02	0.74
Normalized hippocampal volume^*	0.348 (0.051)	0.316 (0.049)	2.04	0.05	0.64
Normalized parahippocampal volume^*	0.233 (0.043)	0.205 (0.035)	2.18	0.04	0.71

CN = cognitively normal; MCI = mild cognitive impairment; MTL = medial temporal lobe. Degrees of freedom for all t-tests = 43.

Values multiplied by 100.