Table 1.
Sociodemographic Characteristics of US infants, 0 to 12 Months Old, Overall and by Type of Milk Consumed: NHANES 2003–2010.
| Type of Milk Consumed |
|||
|---|---|---|---|
| Characteristic | Overall, % (SE) | Formula/Milk, % (SE) | Only Human Milk, % (SE) |
| n | 1864 | 1587 | 277 |
| Weighted % | 81.1 | 18.9 | |
| Male | 49.6 (1.5) | 48.9 (1.5) | 52.7 (4.3) |
| Female | 50.4 (1.5) | 51.1 (1.5) | 47.3 (4.3) |
| Age (mean months)a | 6.4 (0.1) | 6.6 (0.1) | 5.4 (0.3) |
| 0–6a | 54.6 (1.5) | 52.1 (1.6) | 65.0 (3.5) |
| 7–9 | 26.4 (1.5) | 26.8 (1.7) | 24.7 (3.2) |
| 10–12a | 19.0 (1.2) | 21.1 (1.3) | 10.3 (3.0) |
| Race/ethnicityb | |||
| Non-Hispanic whitea | 56.2 (2.8) | 53.1 (3.1) | 69.4 (3.5) |
| Non-Hispanic blacka | 12.9 (1.3) | 14.8 (1.6) | 4.5 (1.2) |
| Mexican Americana | 17.8 (1.6) | 19.1 (1.8) | 12.1 (2.0) |
| IPRc | |||
| 0% to 185% FPTa | 50.6 (2.2) | 54.5 (2.2) | 34.0 (4.2) |
| ≥186% FPTa | 49.4 (2.2) | 45.5 (2.2) | 66.0 (4.2) |
| Household educationc | |||
| <High schoola | 23.1 (1.4) | 26.3 (1.6) | 9.0 (1.8) |
| High school/GED | 23.3 (1.5) | 24.5 (1.6) | 17.9 (3.4) |
| Some college or morea | 50.6 (2.0) | 45.7 (2.0) | 71.9 (4.2) |
Abbreviations: IPR, income-to-poverty ratio; FPT, federal poverty threshold; SE, standard error.
a
denotes significant difference between infants consuming formula or milk and those whose milk source is human milk, P < .05.
b
Children of other Hispanic and other race groups are not described because of the limited sample sizes of these groups.
c
Sample sizes for these variables are based on the 1744 infants without missing data, of whom 266 reported human milk as their only source of milk.