TABLE 3.

Neuroanatomical similarity between Gc and Gf in different sMRI features.

Neuroanatomical similarity	Regression coefficients of LME models		Beta weights of ENR models
	r	ICC	r	ICC
CSA features	0.4827	0.4761	0.0812	0.0817
CT features	0.5184	0.4579	0.3906	0.3910
GMV features	0.2614	0.1649	0.4851	0.2853
All sMRI features	0.4660	0.4388	0.2703	0.2712

Gc, crystalized intelligence; Gf, fluid intelligence; sMRI, structural magnetic resonance imaging. r represents Pearson’s r for the 156 sMRI features [68 indices of regional cortical surface area (CSA) + 68 indices of regional cortical thickness (CT) + 20 indices of gray matter volume (GMV) separately] for Gc and Gf; ICC represent intraclass correlation (ICC) between these same regions for Gc and Gf.