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.
Distribution of participants by race
| Racea | Proportion of participants (%) |
|---|---|
| Native American | 0.9 |
| Asian | 5.5 |
| Pacific Islander | 0.3 |
| African American/Black | 4.8 |
| Caucasian/White | 86.0 |
| More than one race | 1.0 |
| Not reported | 1.5 |
Self-reported by questionnaire.
