Table S2.

Total, left, and right hippocampus volume by preschool and school-age maternal support with nonverbal IQ score as covariate (n = 127)

	Estimate, cm3	SE	t	P
Total hippocampus volume
Intercept	12.7056	5.9581	2.13	0.0351
Age	0.1009	0.0532	1.90	0.0604
Age-squared	0.0156	0.0472	0.33	0.7419
Gender, male 1, female 0	0.0550	0.1167	0.47	0.6384
Income-to-needs ratio	0.0457	0.0736	0.62	0.5358
Nonverbal IQ score	0.0461	0.0577	0.80	0.4257
Total gray volume*	0.0053	0.0007	7.67	<0.0001
Time†	0.0813	0.0106	7.68	<0.0001
Preschool maternal support	0.0068	0.0079	0.87	0.3883
School-age maternal support	0.0087	0.0082	1.06	0.2935
Preschool maternal support × time	0.0035	0.0012	2.83	0.0059
School-age maternal support × time	−0.0001	0.0011	−0.09	0.9262
Left hippocampus volume
Intercept	5.0653	3.1336	1.62	0.1087
Age	0.0518	0.0280	1.85	0.0665
Age-squared	0.0003	0.0248	0.01	0.9891
Gender, male 1, female 0	0.0131	0.0621	0.21	0.8338
Income-to-needs ratio	−0.0216	0.0388	−0.56	0.5797
Nonverbal IQ score	0.0114	0.0304	0.38	0.7078
Total gray volume*	0.0031	0.0004	7.58	<0.0001
Time†	0.0416	0.0069	6.06	<0.0001
Preschool maternal support	0.0025	0.0043	0.59	0.5552
School-age maternal support	0.0088	0.0044	1.99	0.0485
Preschool maternal support × time	0.0019	0.0008	2.37	0.0203
School-age maternal support × time	−0.0009	0.0007	−1.22	0.2254
Right hippocampus volume
Intercept	7.3264	3.1452	2.33	0.0216
Age	0.0476	0.0281	1.70	0.0928
Age-squared	0.0144	0.0249	0.58	0.5643
Gender, male 1, female 0	0.0262	0.0619	0.42	0.6732
Income-to-needs ratio	0.0581	0.0389	1.49	0.1381
Nonverbal IQ score	0.0317	0.0305	1.04	0.3010
Total gray volume*	0.0026	0.0004	6.62	<0.0001
Time†	0.0417	0.0059	7.08	<0.0001
Preschool maternal support	0.0041	0.0042	0.98	0.3302
School-age maternal support	0.0001	0.0044	0.03	0.9789
Preschool maternal support × time	0.0014	0.0007	2.10	0.0393
School-age maternal support × time	0.0007	0.0006	1.21	0.2290

^*Total/left/right hippocampus volume was subtracted from total gray matter volume.

^†Time indicates scan number.