Table 1.

Sample demographic characteristics by income group (n=198)

Variable	Low Incomea (n=81)	High Incomeb (n=117)	Statistic
Age	26.3 ± 6.0	32.6 ± 4.2	t(132)=8.77***
Race/Ethnicity			χ2(4)=36.56***
Black/African-American	11%	2%	χ2(1)=8.06**
Hispanic/Latina	22%	7%	χ2(1)=9.93**
Asian	36%	21%	χ2(1)=5.71*
White/Caucasian	23%	63%	χ2(1)=30.43***
Mixed or Other race	7%	8%	ns
Married Status (all partnered)	32%	87%	χ2(1)=63.54***
College graduate	30%	89%	χ2(1)=73.54***
Household size	3.9 ± 2.8	2.2 ± 0.5	t(184c)=6.46***
Initial employment rated	28%	80%	χ2(1)=53.43***
Working 3mos postpartum	16%	21%	ns
Cesarean birth rate	32%	27%	ns

^aLow income = monthly household income < $3,000;

^bHigh income = monthly household income ≥ $3,000

^cSeparate variance t-test, degrees of freedom adjusted for unequal variances

^dEmployment rate includes employed women on maternity leave

^*p<.05,

^**p<.01,

^***p<.001