Table 3.

Associations of sedentary behavior-related associations in gray matter with intelligence scores.

	Crystallized Score				Fluid Score				Composite Score
	Model 1		Model 2		Model 1		Model 2		Model 1		Model 2
	β	p	β	p	β	p	β	p	β	p	β	p
Watching TV
Middle frontal gyrus	−0.072	0.455	−0.087	0.374	−0.085	0.395	−0.116	0.237	−0.087	0.359	−0.112	0.235
Inferior frontal gyrus, pars triangularis	0.069	0.470	0.058	0.544	0.050	0.611	−0.078	0.426	0.026	0.781	0.006	0.952
Inferior parietal gyrus	−0.105	0.326	−0.110	0.303	−0.030	0.787	−0.041	0.703	−0.077	0.466	−0.086	0.409
Lingua gyrus	−0.006	0.956	−0.017	0.871	−0.136	0.208	−0.163	0.124	−0.080	0.437	−0.101	0.322
Calcarine cortex	0.126	0.207	0.113	0.267	−0.013	0.903	−0.053	0.611	0.070	0.480	0.041	0.680
Postcentral gyrus	−0.004	0.966	−0.014	0.886	0.127	0.207	0.106	0.286	0.091	0.340	0.075	0.433
Playing video games
Fusiform gyrus	0.029	0.783	0.021	0.841	−0.026	0.809	−0.045	0.676	0.013	0.900	−0.001	0.990
Inferior temporal gyrus	−0.054	0.591	−0.075	0.461	−0.044	0.673	−0.090	0.386	−0.040	0.684	−0.076	0.442
Inferior temporal gyrus	0.191	0.063	0.178	0.087	−0.007	0.947	−0.049	0.643	0.129	0.202	0.101	0.323
Total sedentary time
Cerebellum Crus I	0.111	0.254	0.097	0.325	−0.036	0.720	−0.077	0.445	0.040	0.680	0.010	0.916
Cerebellum Crus II	0.292	0.003 *	0.288	0.005 *	0.140	0.179	0.084	0.434	0.229	0.020	0.195	0.055

Values are standardized regression coefficients (β). Model 1: Analyses were adjusted for sex, peak height velocity offset (years), parent education university level (neither/one/both) and body mass index (kg/m²). Model 2: Adjustments for model 1 plus and cardiorespiratory fitness (mL/kg/min). Statistically significant values are shown in bold (p < 0.05), and borderline significant values are shown in italics (p < 0.1). * These associations remained significant when P values were adjusted for multiple comparisons using the Benjamini and Hochberg method to control for the false discovery rate.