FIGURE.
Participants in the 2005–2008 follow-up to the Child Health and Development Studies included in the current analysis.
a Attempted contact
b 160 participants provided two samples, 36 provided one
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.