Table 2.

Associations between g and global MRI measures across the whole sample.

Model	Individual			Simultaneous
	Std. Est.	SE	p	Std. Est.	SE	p
TBV	0.276	0.019	<0.001	–		–
GM	0.281	0.020	<0.001	0.201	0.019	<0.001
NAWM	0.246	0.013	<0.001	0.102	0.020	<0.001
WMH	−0.106	0.013	<0.001	−0.097	0.013	<0.001
gFA	0.090	0.018	<0.001	−0.003	0.018	0.865
gMD	−0.066	0.012	<0.001	−0.037	0.019	0.049

Note. Standardised estimates (Std. Est.) and standard errors (SE) reported. TBV: total brain volume, GM: grey matter volume, NAWM: normal-appearing white matter volume, WMH: white matter hyperintensity volume, gFA: general factor of white matter fractional anisotropy, gMD: general factor of white matter mean diffusivity. Manifest variables are corrected for age and sex; brain measures also corrected for head positioning confounds.