Table 1.

Composition of the analytic sample. (n = 6951. All estimates use sampling weights.)

	per cent
sex
male	54.0
female	46.0
race/ethnicity
latino/a	11.2
white (non-latino)	71.9
black (non-latino)	13.1
asian (non-latino)	2.5
native american (non-latino)	0.7
other (non-latino)	0.7
parent education
less than high school	13.1
high school diploma/general educational development (GED)	31.4
some college	21.3
college degree	23.2
more than college	10.9
breastfeeding duration
never	55.2
less than three months	14.0
three to six months	10.4
6–12 months	13.4
greater than 12 months	7.1
birth control pill	14.8
daily smoker	24.9
first born child	63.2