Table 1. Crude Breastfeeding Rates Among 167 842 Children Born From 2009 to 2015a.
| Variable | Year of Birth, % (SE) | Slopeb | P Value for Trendb | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | |||
| Ever breastfeeding | |||||||||
| Total | 76.1 (0.50) | 77.0 (0.51) | 78.8 (0.50) | 80.5 (0.48) | 81.1 (0.44) | 82.2 (0.44) | 83.2 (0.53) | 1.22 | <.001 |
| Hispanic | 80.1 (1.07) | 79.1 (1.20) | 83.1 (1.05) | 82.9 (1.07) | 82.9 (1.01) | 85.3 (0.93) | 84.6 (1.21) | 0.92 | <.001 |
| Non-Hispanic white | 77.7 (0.62) | 79.0 (0.59) | 80.7 (0.59) | 83.2 (0.51) | 84.4 (0.49) | 85.0 (0.50) | 85.9 (0.60) | 1.43 | <.001 |
| Non-Hispanic black | 60.7 (1.56) | 62.3 (1.55) | 62.4 (1.68) | 67.0 (1.49) | 66.3 (1.44) | 68.1 (1.44) | 69.4 (1.80) | 1.49 | <.001 |
| Non-Hispanic Asian | 86.3 (1.91) | 82.9 (2.67) | 86.9 (2.18) | 83.7 (2.73) | 84.2 (1.84) | 81.4 (2.92) | 89.3 (1.79) | 0.12 | .77 |
| Non-Hispanic American Indian or Alaskan Native | 69.1 (5.44) | 75.4 (4.01) | 72.7 (4.13) | 74.5 (4.13) | 69.5 (3.99) | 76.1 (3.18) | 76.4 (5.78) | 0.71 | .46 |
| Exclusive breastfeeding through 6 mo | |||||||||
| Total | 15.7 (0.45) | 17.4 (0.48) | 19.0 (0.49) | 22.3 (0.53) | 23.3 (0.49) | 25.7 (0.53) | 24.9 (0.60) | 1.74 | <.001 |
| Hispanic | 15.5 (1.09) | 17.0 (1.21) | 16.8 (1.18) | 20.1 (1.24) | 20.8 (1.21) | 25.2 (1.36) | 20.9 (1.32) | 1.31 | <.001 |
| Non-Hispanic white | 16.6 (0.51) | 18.7 (0.56) | 20.9 (0.58) | 25.2 (0.68) | 27.4 (0.62) | 28.1 (0.61) | 29.5 (0.80) | 2.29 | <.001 |
| Non-Hispanic black | 10.7 (1.08) | 12.6 (1.22) | 14.8 (1.34) | 14.3 (1.17) | 15.4 (1.11) | 17.4 (1.22) | 17.2 (1.57) | 1.05 | <.001 |
| Non-Hispanic Asian | 22.0 (3.05) | 20.7 (2.68) | 26.7 (2.80) | 26.8 (2.70) | 24.4 (2.41) | 28.9 (2.52) | 30.1 (2.97) | 1.38 | .02 |
| Non-Hispanic American Indian or Alaskan Native | 13.4 (2.90) | 11.2 (2.56) | 16.2 (3.13) | 17.3 (3.53) | 20.4 (3.20) | 25.5 (4.06) | 19.6 (3.66) | 1.84 | .003 |
| Breastfeeding continuation at 12 mo | |||||||||
| Total | 24.6 (0.51) | 25.3 (0.55) | 26.8 (0.55) | 29.5 (0.56) | 31.3 (0.52) | 34.1 (0.55) | 35.9 (0.67) | 2.00 | <.001 |
| Hispanic | 26.1 (1.23) | 26.5 (1.40) | 25.2 (1.36) | 27.9 (1.36) | 26.7 (1.19) | 32.3 (1.37) | 32.6 (1.57) | 1.17 | <.001 |
| Non-Hispanic white | 25.7 (0.60) | 27.2 (0.63) | 28.7 (0.64) | 33.1 (0.72) | 36.1 (0.66) | 37.9 (0.65) | 39.8 (0.83) | 2.54 | <.001 |
| Non-Hispanic black | 15.9 (1.23) | 14.4 (1.23) | 17.3 (1.37) | 18.3 (1.29) | 20.2 (1.17) | 23.1 (1.31) | 24.0 (1.61) | 1.59 | <.001 |
| Non-Hispanic Asian | 34.9 (2.87) | 33.0 (2.88) | 43.9 (3.12) | 39.5 (2.77) | 40.9 (2.40) | 40.1 (2.55) | 50.3 (3.46) | 2.06 | <.001 |
| Non-Hispanic American Indian or Alaskan Native | 22.8 (5.96) | 23.7 (6.93) | 22.7 (3.66) | 25.3 (4.28) | 21.7 (3.01) | 27.3 (3.93) | 31.3 (5.48) | 1.13 | .29 |
a
Each birth cohort includes data from 3 survey years except for 2009 and 2015 births, when only 2 survey years of data were available.
b
Slope and P values for trend were obtained by unadjusted linear regression models, with P < .05 indicating a significant trend.