Final Exclusive Breastfeeding Rates by Socio-demographic Factors, Among Children Born in 2005 (Percent +/- half 95% Confidence Interval)
Socio-demographic
Factors		 n Exclusive Breastfeeding1
through 3 Months		 Exclusive Breastfeeding1
through 6 Months
US National 23279 32.1±1.0 12.3±0.7
Sex
  Male 11859 31.9±1.5 12.3±1.1
  Female 11420 32.3±1.4 12.3±1.0
Race/ethnicity
  American Indian or Alaska Native 808 27.6±5.4 8.1±2.2
  Asian or Pacific Islander 1521 36.2±4.5 15.2±3.1
    -Asian 1279 36.0±5.0 15.8±3.4
    -Native Hawaiian and other 311 38.3±9.1 13.2±5.5
  Black or African American 3383 19.8±2.0 7.4±1.4
  White 18854 34.3±1.2 13.3±0.8
  Hispanic or Latino 4776 32.8±2.4 12.3±1.7
  Not Hispanic or Latino (NH) 18503 31.8±1.1 12.3±0.7
    -NH Black or African American 2943 18.7±2.0 7.0±1.3
    -NH White 14704 34.7±1.2 13.4±0.8
Birth Order
  First Born 12038 33.4±1.5 12.7±1.0
  Not First Born 11241 30.7±1.4 12.0±1.0
Receiving WIC2
  Yes 9791 24.6±1.5 8.8±1.0
  No, but eligible 1105 39.9±5.3 16.7±3.6
  Ineligible 11302 40.8±1.5 16.1±1.1
Maternal Age, Years
  <20 504 19.5±6.5 8.6±4.3
  20-29 8085 27.0±1.6 10.7±1.2
  >=30 14690 36.4±1.3 13.7±0.9
Maternal Education
  Not a High School Graduate 2763 24.3±2.8 9.3±1.8
  High School Graduate 4276 26.2±2.1 10.7±1.5
  Some College 6417 31.4±1.9 11.1±1.3
  College Graduate 9823 43.8±1.5 17.0±1.1
Maternal Marital Status
  Married 17653 37.1±1.2 14.2±0.9
  Unmarried3 5626 20.6±1.8 8.0±1.2
Residence
  MSA4, Central City 9988 32.0±1.7 12.5±1.1
  MSA, Non-Central City 8686 33.4±1.6 12.6±1.2
  Non-MSA 4605 28.7±2.1 11.2±1.6
Poverty Income Ratio5, %
  <100% 4243 26.5±2.4 9.6±1.6
  100%-184% 3529 27.8±2.7 10.5±1.8
  185%-349% 5521 33.8±2.0 13.4±1.4
  ≥350% 7949 40.1±1.7 15.1±1.3

1Exclusive breastfeeding 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 DNPAO breastfeeding analyses, the sample was limited to records with valid responses to the breastfeeding questions.