Table 1. Breastfeeding Rates by Socio-demographic Factors, Among Children Born in 2004 (Percent +/- half 95% Confidence Interval)
Socio-demographic
Factors		 Number Ever
Breastfeeding		 Breastfeeding
at 6 months		 Breastfeeding
at 12 months		 Number Exclusive Breastfeeding1
at 3 months		 Exclusive Breastfeeding1 at 6 months
US National 21035 73.8±1.0 41.5±1.1 20.9±0.9 17654 30.5±1.1 11.3±0.8
Sex
Male 10735 73.6±1.4 40.8±1.6 20.0±1.3 8986 30.7±1.6 10.8±1.0
Female 10300 73.9±1.4 42.2±1.6 21.8±1.4 8668 30.3±1.6 11.7±1.2
Race/ethnicity
American Indian or Alaska 724 77.5±4.9 42.3±6.9 24.3±5.8 604 28.4±6.3 11.4±4.2
Asian or Pacific islander 1467 81.7±3.4 51.8±4.4 29.1±3.9 1216 33.4±4.4 15.8±3.5
  Asian 1275 81.3±3.6 53.7±4.6 30.4±4.2 1073 34.1±4.7 16.1±3.7
  Native Hawaiian and other 246 85.4±7.9 43.7±12.7 26.5±10.8 184 26.1±10.4 13.5±7.9
Black or African American 3622 60.9±2.7 29.3±2.5 13.4±1.8 2971 22.0±2.5 7.9±1.5
White 16442 76.1±1.1 43.2±1.3 21.9±1.1 13845 31.9±1.3 11.7±0.9
Hispanic or Latino 4890 81.0±1.9 45.1±2.5 24.1±2.2 4086 30.9±2.5 11.6±1.8
Not Hispanic or Latino 16145 70.7±1.2 40.0±1.2 19.6±0.9 13568 30.3±1.2 11.1±0.8
  Black or African American 3010 56.2±3.0 26.3±2.7 11.9±1.8 2477 20.1±2.6 7.5±1.6
  White 12423 73.9±1.3 42.5±1.4 20.8±1.1 10469 32.6±1.4 11.8±0.9
Birth Order
First Born 10999 73.5±1.4 42.9±1.6 22.8±1.4 9328 31.0±1.6 11.9±1.1
Not First Born 10036 74.1±1.5 39.9±1.6 18.8±1.3 8326 29.9±1.6 10.5±1.1
Receiving WIC2
Received WIC 9456 66.9±1.6 33.1±1.6 16.7±1.3 7931 23.4±1.6 8.1±1.0
No WIC but eligible 981 78.6±4.2 51.1±5.0 28.2±4.4 826 40.2±5.3 14.7±3.6
No WIC and ineligible 9602 82.1±1.2 50.9±1.6 25.1±1.4 8089 38.7±1.7 14.4±1.2
Maternal Age, Year
Mom age<20 525 55.8±7.0 17.2±5.6 8.6±4.1 423 16.8±6.5 6.1±4.6
20<=Mom age<=29 7936 69.8±1.7 35.0±1.8 16.7±1.5 6614 26.2±1.8 8.4±1.1
Mom age>=30 12574 77.9±1.2 48.0±1.5 24.9±1.3 10617 34.6±1.4 13.8±1.1
Maternal Education
<High School 2685 67.7±2.8 34.9±3.0 18.5±2.4 2283 23.9±2.9 9.1±2.0
High School 4723 65.7±2.1 32.2±2.1 16.8±1.7 3920 22.9±2.0 8.2±1.2
Some College 4675 75.2±2.1 40.9±2.4 18.5±2.0 4134 32.8±2.5 12.3±2.1
College Graduate 8952 85.3±1.1 55.8±1.6 28.2±1.5 7317 41.5±1.8 15.4±1.3
Maternal Marital Status
Married 15668 79.6±1.1 48.3±1.3 24.5±1.2 13171 35.4±1.4 13.4±1.0
Unmarried3 5367 60.0±2.2 25.5±1.9 12.4±1.5 4483 18.8±1.9 6.1±1.1
Residence
MSA4, Central City 10177 75.0±1.5 42.7±1.7 22.2±1.4 8415 30.7±1.7 11.7±1.2
MSA, Non-Central City 7119 76.1±1.6 44.0±1.9 22.0±1.6 5993 32.8±1.9 12.1±1.3
Non-MSA 3739 64.6±2.6 31.7±2.3 14.5±1.6 3246 23.9±2.1 8.2±1.3
Poverty Income Ratio5, %
Pov-Inc Ratio <100% 3753 65.9±2.5 35.1±2.5 18.6±2.0 3203 23.9±2.3 8.3±1.4
100%<=Pov-Inc Ratio<185% 3396 70.8±2.6 35.0±2.8 16.6±2.2 2860 26.6±2.8 8.9±1.7
185%<=Pov-Inc Ratio <350% 4782 75.1±2.1 41.5±2.3 21.3±1.9 4113 33.2±2.3 11.8±1.5
350%<=Pov-Inc Ratio 6783 81.5±1.5 49.8±1.9 23.6±1.7 5624 37.7±2.0 14.0±1.4
1Exclusive breastfeeding information is from 2006 NIS survey data only and is defined as ONLY breast milk — NO solids, no water, and no other liquids.
2WIC = Special Supplemental Nutrition Program for Women, Infants, and Children.
3Unmarried includes never married, widowed, separated, divorced.
4MSA = Metropolitan Statistical Area defined by the Census Bureau.
5Poverty Income Ratio = Ratio of self-reported family income to the federal poverty threshold value depending on the number of people in the household.
Source: National Immunization Survey, Centers for Disease Control and Prevention, Department of Health and Human Services
Sample sizes appearing in the NIS breastfeeding tables are slightly smaller than the numbers published in other NIS publications due to the fact that in the DNPA breastfeeding analyses, the sample was limited to records with valid responses to the breastfeeding questions.