Table 2.

Descriptive statistics of between-site ICC across neuroanatomical measures before and after adjusting for scanner offsets.

Type of neuroanatomical measurea	Between-site ICCs for all ROIs
	Median		1st quantile		3rd quantile		Interpretationb
	Raw	Adjusted	Raw	Adjusted	Raw	Adjusted	Raw	Adjusted
Cortical thickness	0.63	0.69	0.51	0.60	0.73	0.77	Fair ~ Good	Good ~ Excellent
Surface area	0.87	0.91	0.84	0.86	0.94	0.95	Excellent	Excellent
Cortical volume	0.87	0.90	0.78	0.80	0.92	0.93	Excellent	Excellent
Subcortical volume	0.84	0.86	0.71	0.74	0.92	0.94	Good ~ Excellent	Good ~ Excellent

^aCortical parcellations (34 ROIs per hemisphere) were defined using the Desikan atlas (Desikan et al., 2006). Selected deep brain structure volumes were derived by automatic subcortical segmentation pipeline using Freesurfer (Fischl et al., 2002).

^bInterpretations were made based on the range between 1st and 3rd quantiles.