Table 2.

Weighted correlations and descriptive statistics for study variables

	1	2	3	4	5	6	7	8	9	10	11	12	13	14
1. Prenatal Risk	-
2. Bayley MDI (15 months)	−.17	-
3. EF (36 months)	−.10	.23	-
4. IQ (36 months)	−.14	.39	.40	-
5. Male	−.00±	−.12	−.10	−.16	-
6. Maternal education (years)	−.16	.20	.25	.36	.00±	-
7. Caregiver sensitivity(infant)	−.11	.22	.27	.34	−.02±	.49	-
8. Caregiver intrusiveness(infant)	.07	−.16	−.22	−.26	.05±	−.35	−.29	-
9. Childcare quality (infant)	.01±	.18	.10±	.21	.02±	.14	.19	−.23	-
10. Caregiver sensitivity (toddler)	−.16	.30	.31	.41	−.01±	.52	.69	−.32	.20	-
11. Caregiver intrusiveness (toddler)	.19	−.31	−.30	−.45	.10	−.39	−.37	.45	−.21	−.57	-
12. Childcare quality (toddler)	.06±	.13	.10±	.24	.02±	.17	.16	−.06±	.25	.13	−.10	-
13. Income-to-needs ratio (infant)	−.12	.17	.22	.35	.05±	.58	.39	−.30	.22	.41	−.30	.22	-
14. Income-to-needs ratio (toddler)	−.13	.20	.22	.36	.04±	.59	.39	−.27	.21	.42	−.31	.23	.87	-
n	1227	1087	968	1049	1287	1287	1200	1200	622	1125	1125	586	1172	1147
M	−.02	97.80	−.45	96.90	.52	13.02	2.98	2.23	25.32	3.02	2.21	20.99	2.23	2.18
SD	1.00	10.36	.54	16.72		2.21	.71	.59	2.30	.69	.71	3.83	1.82	1.66

Note. MDI = Mental Development Index; EF = executive function. Sample sizes for correlations range from 448 to 1287, given variation among participants’ study completion. “Infant” measures are averages taken from 6- and 15-month observations. “Toddler” measures are averages taken from 24- and 35-month observations. All correlations are significant at p < .05, except where marked

^±(indicates p > .05).