Table 6.

Linear regression estimates for AWC predicting myelination in the brain

Side/area	Region	Term	Estimate	SE	t Statistic	p Value
Left	Frontal	(Intercept)	0.064	0.005	13.636	0.001
		AWC	0.001	0.001	−0.063	0.950
		AgeGroup	0.061	0.009	6.503	0.001
		SES	−0.008	0.005	−1.669	0.099
		AWC:AgeGroup	0.001	0.001	2.824	0.006
		AWC:SES	0.001	0.001	1.594	0.115
		AgeGroup:SES	−0.013	0.009	−1.452	0.151
		AWC:AgeGroup:SES	0.001	0.001	1.681	0.097
Right	Frontal	(Intercept)	0.066	0.005	13.942	0.001
		AWC	0.001	0.001	−0.417	0.678
		AgeGroup	0.071	0.010	7.482	0.001
		SES	−0.012	0.005	−2.621	0.011
		AWC:AgeGroup	0.001	0.001	2.005	0.049
		AWC:SES	0.001	0.001	2.947	0.004
		AgeGroup:SES	−0.025	0.009	−2.752	0.007
		AWC:AgeGroup:SES	0.001	0.001	3.202	0.002
Left	Internal capsule	(Intercept)	0.088	0.005	16.520	0.001
		AWC	0.001	0.001	−0.490	0.626
		AgeGroup	0.069	0.011	6.530	0.001
		SES	−0.008	0.005	−1.592	0.116
		AWC:AgeGroup	0.001	0.001	0.534	0.595
		AWC:SES	0.001	0.001	1.677	0.098
		AgeGroup:SES	−0.018	0.010	−1.818	0.073
		AWC:AgeGroup:SES	0.001	0.001	2.653	0.010
Right	Corona radiata	(Intercept)	0.086	0.005	18.160	0.001
		AWC	0.001	0.001	−0.482	0.631
		AgeGroup	0.086	0.010	9.028	0.001
		SES	−0.010	0.005	−2.301	0.024
		AWC:AgeGroup	0.001	0.001	2.026	0.046
		AWC:SES	0.001	0.001	2.695	0.009
		AgeGroup:SES	−0.024	0.009	−2.594	0.011
		AWC:AgeGroup:SES	0.001	0.001	3.317	0.001
Body	Corpus callosum	(Intercept)	0.079	0.005	15.426	0.001
		AWC	0.001	0.001	−1.007	0.317
		AgeGroup	0.084	0.010	8.138	0.001
		SES	−0.014	0.005	−2.767	0.007
		AWC:AgeGroup	0.001	0.001	1.534	0.129
		AWC:SES	0.001	0.001	2.735	0.008
		AgeGroup:SES	−0.016	0.010	−1.576	0.119
		AWC:AgeGroup:SES	0.001	0.001	2.217	0.030
Genu	Corpus callosum	(Intercept)	0.081	0.005	14.959	0.001
		AWC	0.001	0.001	−0.941	0.350
		AgeGroup	0.098	0.011	9.054	0.001
		SES	−0.012	0.005	−2.246	0.028
		AWC:AgeGroup	0.001	0.001	1.669	0.099
		AWC:SES	0.001	0.001	2.738	0.008
		AgeGroup:SES	−0.023	0.010	−2.244	0.028
		AWC:AgeGroup:SES	0.001	0.001	2.923	0.005

Fixed effects are displayed including AWC, age group (6 or 30 months), and maternal education z score (SES). The α level is set at p < 0.01; effects below this threshold are highlighted in bold.