Table 2.

Genetic and unique environmental standardized variance components and correlations (95% CI)

	Surface area		Cortical thickness		Correlations
	A	E	A	E	Phenotypic	Genetic	Environmental
Total gray matter	0.89 (0.66, 0.96)	0.06 (0.04, 0.08)	0.81 (0.56, 0.87)	0.17 (0.12, 0.23)	0.01 (−0.09, 0.12)	0.08 (−0.11, 0.29)	−0.13 (−0.31, 0.06)
Left frontal lobe	0.88 (0.64, 0.95)	0.06 (0.05, 0.09)	0.78 (0.54, 0.84)	0.21 (0.16, 0.29)	−0.05 (−0.16, 0.05)	−0.02 (−0.19, 0.21)	−0.10 (−0.28, 0.09)
Right frontal lobe	0.81 (0.58, 0.94)	0.08 (0.06, 0.11)	0.70 (0.40, 0.80)	0.26 (0.19, 0.35)	−0.05 (−0.15, 0.06)	0.08 (−0.18, 0.36)	−0.23 (−0.39, −0.04)
Left temporal lobe	0.87 (0.60, 0.91)	0.12 (0.09, 0.16)	0.63 (0.39, 0.73)	0.36 (0.27, 0.49)	−0.01 (−0.11, 0.09)	0.05 (−0.14, 0.33)	−0.23 (−0.40, −0.05)
Right temporal lobe	0.85 (0.68, 0.90)	0.13 (0.10, 0.18)	0.67 (0.37, 0.82)	0.24 (0.18, 0.32)	−0.01 (−0.11, 0.10)	0.01 (−0.09, 0.35)	−0.20 (−0.38, −0.02)
Left parietal lobe	0.87 (0.65, 0.92)	0.11 (0.08, 0.15)	0.74 (0.47, 0.83)	0.23 (0.17, 0.31)	0.10 (−0.01, 0.20)	0.17 (−0.01, 0.42)	−0.08 (−0.27, 0.10)
Right parietal lobe	0.77 (0.50, 0.88)	0.16 (0.12, 0.22)	0.74 (0.46, 0.80)	0.26 (0.20, 0.35)	0.08 (−0.02, 0.18)	0.14 (−0.11, 0.42)	−0.10 (−0.28, 0.08)
Left occipital lobe	0.64 (0.36, 0.83)	0.21 (0.16, 0.29)	0.71 (0.43, 0.79)	0.27 (0.21, 0.37)	−0.01 (−0.11, 0.09)	0.09 (−0.22, 0.43)	−0.11 (−0.29, 0.07)
Right occipital lobe	0.31 (0.01, 0.65)	0.35 (0.26, 0.46)	0.52 (0.19, 0.77)	0.29 (0.22, 0.38)	−0.04 (−0.14, 0.07)	0.10 (−0.58, 0 31)	−0.03 (−0.21, 0.16)

Note: A, proportion of phenotypic variance due to genetic factors (heritability); E, proportion of phenotypic variance due to unique environmental factors. For simplicity of presentation, shared environment effects (C), although estimated in the model, are omitted.