TABLE 1.
Weighted Demographic Characteristics of Study Population (N = 3297)
| Demographic | Na | Weighted (%) | US Vital Statistics (2011–2013) |
|---|---|---|---|
| Maternal age (y) | |||
| <20 | 275 | 7.5 | 7.8 |
| 20–29 | 1788 | 52.2 | 51.6 |
| ≥30 | 1234 | 40.3 | 40.6 |
| Maternal education | |||
| <HS | 478 | 12.8 | 17.1 |
| HS or GED | 833 | 23.5 | 25.1 |
| Some college | 1041 | 30.8 | 29.0 |
| ≥College degree | 932 | 32.9 | 28.8 |
| Parity | |||
| 1 | 1215 | 37.9 | 39.7 |
| 2 | 1095 | 33.7 | 31.5 |
| ≥3 | 978 | 28.4 | 28.3 |
| Maternal race and/or ethnicity | |||
| Non-Hispanic white | 1275 | 52.3 | 54.1 |
| Non-Hispanic African American | 828 | 12.9 | 14.8 |
| Hispanic | 912 | 26.0 | 23.0 |
| Other | 281 | 8.8 | 8.0 |
| Income ($) | |||
| <20 000 | 1158 | 29.5 | NA |
| 20 000–49 999 | 838 | 24.8 | NA |
| ≥50 000 | 577 | 19.8 | NA |
| Unknown | 724 | 26.0 | NA |
| Region | |||
| Northeast | 634 | 21.2 | NA |
| Midwest | 496 | 12.8 | NA |
| South | 1383 | 41.5 | NA |
| West | 784 | 24.5 | NA |
| Infant age (wk) | |||
| 8–11 | 2026 | 62.9 | NAb |
| 12–15 | 564 | 17.0 | NAb |
| 16–19 | 323 | 9.4 | NAb |
| ≥20 | 384 | 10.7 | NAb |
| Infant sex | |||
| Girl | 1685 | 50.7 | 48.8 |
| Boy | 1608 | 49.3 | 51.2 |
| Infant birth weight (g) | |||
| <2500 | 202 | 5.7 | 8.0 |
| ≥2500 | 3076 | 94.3 | 91.9 |
GED, general education development; HS, high school; NA, not available/applicable.
a
Not all numbers add up to 3297 because of missing data.
b
US Vital Statistics Data not applicable to infant age at time of survey response.