An official website of the United States government
Here's how you know
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.
Unadjusted sex risk scores from age 14 to 27, by race, National Longitudinal Survey of Youth, 1997–2007. Error bars represent 95% CIs around the black–white difference in means at each age.