Table 4.

The p-values and the mean z-score between-group differences (listed inside the parenthesis) obtained from both the volume and the shape analysis of contrasts between the ε4 carriers and non-carriers within the entire MCI group, the Young-Old MCI (MCI-YO) group, and the Very-Old MCI (MCI-VO) group respectively. Bold italic typesetting indicates the group difference in that comparison is statistically significant after multiple comparison correction at a level of p = 0.0125. For the mean z-score difference, the more positive, the more atrophy there is in the latter group, and the more negative, the more atrophy there is in the former group.

	MCI-e3 vs. MCI-e4		MCI-YO-e3 vs. MCI-YO-e4		MCI-VO-e3 vs. MCI-VO-e4
	volume	shape	volume	shape	volume	shape
lhi	0.0031 (0.466)	0.0382 (0.184)	0.0022 (0.736)	0.0111 (0.279)	0.6015 (0.102)	0.8980 (0.078)
rhi	0.0006 (0.546)	0.0016 (0.318)	0.0007 (0.750)	0.0104 (0.362)	0.4850 (0.166)	0.5145 (0.203)
lam	0.1025 (0.288)	0.3265 (0.169)	0.1160 (0.395)	0.1810 (0.227)	0.5380 (0.124)	0.6255 (0.121)
ram	0.0008 (0.509)	0.0000 (0.404)	0.0033 (0.583)	0.0016 (0.382)	0.2445 (0.215)	0.1370 (0.327)

Key: lhi – left hippocampus, rhi – right hippocampus, lam – left amygdala, ram – right amygdala.