Table 2.

Comparison of total intracranial volume.

	NQ	FS	HAD	p	NQ vs. FS			NQ vs. HAD			FS vs. HAD
					p	ICC	d	p	ICC	d	p	ICC	d
Total	1427.37 ± 152.94	1414.41 ± 142.18	1381.46 ± 140.69	<0.001	0.101	0.967 (0.948–0.979)	0.088	<0.001	0.926 (0.885–0.953)	0.312	<0.001	0.961 (0.939–0.975)	0.233
Non-AD	1473.69 ± 158.79	1446.49 ± 144.85	1420.02 ± 139.01	<0.001	0.007	0.965 (0.936–0.981)	0.179	0.04	0.894 (0.808–0.942)	0.360	0.040	0.937 (0.886–0.966)	0.186
AD	1364.21 ± 120.35	1370.66 ± 127.97	1328.89 ± 126.94	<0.001	1.000	0.971 (0.941–0.986)	0.052	<0.001	0.960 (0.919–0.980)	0.286	<0.001	0.992 (0.983–0.996)	0.286

Note—Data are presented as mean ± standard deviation and intraclass correlation coefficient with 95% confidence interval and effect size (d). AD, Alzheimer’s disease; FS, FreeSurfer; HAD, Heuron AD; NQ, NeuroQuant.