Table 1.

Participant characteristics for Cohorts 1 and 2.

	Cohort 1 (N = 227)	Cohort 2 (N = 180)
Maternal Race/Ethnicity (%)
Latina	27.3	22.0
Black	2.6	10.7
Asian	9.7	11.9
Non-Hispanic White	48.5	50.3
Other	11.9	5.1
Maternal Age (mean years)	30.0	30.8
Education (%)
High School or Less	14.5	17.0
Some College, Associates or Vocational Degree	40.5	32.2
4-year College Degree	28.6	31.1
Graduate Degree	16.3	19.8
Annual Household Income (mean; US $)	60,784	66,129
Cohabitation with Child's Father (% yes)	89.4	88.0
Birth Order (% first born)	43.6	58.7
Child Sex (% female)	48.5	53.3
Length of Gestation (mean weeks)	39.2	39.0
Mood Entropy (mean)	53.1	57.8