Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Demographic characteristics of current sample.
| Mean/Percentage | SD | Range | |
|---|---|---|---|
| Age | |||
| Mother (years) | 30.39 | 4.75 | 20–40 |
| Gestational age | 39.28 | 0.75 | 37–41 |
| Infant (weeks) | 19.84 | 2.63 | 15–26 |
| Household income | |||
| $0–24,999 | 14% | ||
| $25,000–49,999 | 18% | ||
| $50,000–79,999 | 15% | ||
| >80,000 | 48% | ||
| Did not report | 5% | ||
| Maternal Education | |||
| High school graduate or less | 14% | ||
| Some college/Junior college | 26% | ||
| College graduate or beyond | 60% | ||
| Married | 70% | ||
| Ethnicity | |||
| European American | 69% | ||
| African American | 13% | ||
| Hispanic | 6% | ||
| Asian | 2% | ||
| Other | 9% |
