Table 1.

Demographic Information

Maternal age (years)
M(SD)	33.72 (4.05)
Infant age (months)
Home Visit M (SD)	6.68 (.45)
Lab Visit M (SD)	12.12 (.71)
Maternal ethnicity
Caucasian	79.7 %
Asian	9.4 %
Black	6.3 %
Hispanic	1.6 %
Native American	1.6 %
Multiracial/Other	1.6 %
Infant ethnicity
Caucasian	69.2 %
Asian	3.1 %
Black	4.5 %
Multiracial/Other	23.1 %
Income-to-needs ratio; M (SD)	5.76 (3.60)
Maternal education (% with at least a 4 year college degree)	87.7 %
Paternal education (% with at least a 4 year college degree)	82.6 %
Maternal occupational prestige (1-5 scale); M (SD)	3.96 (1.02)
Paternal occupational prestige (1-5 scale); M (SD)	3.76 (1.07)
Maternal Parenting Stress (36 – 180 scale); M (SD)	73.58 (11.36)
Number of Stressful Life Events M (SD)	2.34 (1.91)
Maternal Depression (0 - 60 scale); M (SD)	10.23 (8.21)
Infants Breastfeeding at 6 months (%)	82.8 %
Infants Breastfeeding at 12 months (%)	64.6 %