Table 2.

Longitudinal ICCs and ${\sigma }_{ϵ}^2$ of cGM, WM, and LatV before and after harmonization. Details about each dataset are shown in Table 1 (Sites S₃ to S₁₀). For longitudinal ICC higher values are better, while for ${\sigma }_{ϵ}^2$ lower values are better.

Dataset	# Subjects	# Sessions	Structure	ICC (%) ↑		${\sigma }_{ϵ}^2$ ↓
				Before	After	Before	After
OASIS3	721	1,117	cGM	81.95	95.13	83.6	44.8
			WM	83.54	95.85	64.1	31.9
			LatV	96.37	96.38	25.4	25.2
BLSA	1,037	2,655	cGM	86.98	96.49	106.9	52.1
			WM	87.35	96.38	133.1	59.3
			LatV	95.96	95.99	46.2	29.7