Table 1.

Descriptive Statistics f or Variables in the Analysis

	N	Mean	SD	Range
Cortisol 7mos (log μg/dl)	1106	−1.88	.69	−3.9 – .22
Cortisol 15mos (log μg/dl)	991	−1.99	.76	−4.3 – .49
Cortisol 24mos (log μg/dl)	939	−2.08	.73	−4.4 – .25
Positive parenting 7mos	1141	2.90	.79	1.0 – 4.8
Positive parenting 15mos	1100	2.79	.80	1.0 – 5.0
Positive parenting 24mos	1055	2.89	.81	1.0 – 4.8
Negative parenting 7mos	1141	2.41	.77	1.0 – 5.0
Negative parenting 15mos	1100	2.27	.69	1.0 – 5.0
Negative parenting 24mos	1055	2.43	.87	1.0 – 5.0
Executive functions 36mos	950	.49	.21	.00 – 1.0
IQ 36mos	1046	93.64	16.5	45 – 142
Income-to-need	1236	1.76	1.5	.00 – 16.5
Maternal education	1123	12.97	2.00	7 – 20
Household density 7mos	1152	1.55	.62	.67 – 5.0
Household density 24mos	1098	1.51	.58	.50 – 5.5
Household safety 7mos	1177	3.00	.58	1.0 – 4.0
Household safety 24mos	1105	3.00	.49	1.0 – 4.0