Table 3.

Regional brain volumes and fluid ability (G_f): LDM analyses summary

ROI	Level T1 r	Level T1 z	Level T2 r	Level T2 z	Change r	Change z
LPFC	0.28*	2.12	0.35*	2.63	0.23	1.45
OFC	0.36*	2.72	0.36*	2.70	−0.02	−0.13
PFw	0.32*	2.45	0.37*	2.84	0.20	1.54
VC	0.23	1.29	0.23	1.76	−0.05	−0.33
Cd	0.16	1.09	0.16	1.27	−0.05	−0.31
HC	0.25	1.94	0.36*	2.71	0.34*	2.07
EC	−0.03	−0.23	0.13	1.01	0.47*	2.84
Cb	0.11	0.92	0.11	0.92	−0.02	−0.13
IPw	0.06	0.50	0.12	0.94	0.27	1.37
FG	0.23	1.77	0.22	1.68	0.03	0.21
IT	−0.02	−0.16	0.05	0.43	0.20	1.37

Note: In the measurement model for G_f, the estimated correlation of baseline (T1) and follow-up (T2) values was r = 0.98. The variance in change was not reliable (variance = 0.107; standard error = 0.382; z = 0.281) and was hence set to zero in the multivariate models. The first 2 columns refer to correlations between brain volumes at T1 and G_f at T1. The 2 middle columns refer to correlations between brain volumes at T2 and G_f at T2. The last 2 columns refer to correlations between changes in brain volume from T1 to T2 and G_f. Here results are identical for fluid ability at T1 or T2, as individual differences in fluid ability were perfectly correlated across occasions. Cd, caudate nucleus; IPw, inferior parietal white matter; IT, inferior temporal cortex; VC, visual (pericalcarine) cortex.

^*P < 0.05.