Fig. 1.
a Percentage of agreement (three categories) between self-report at first- and second-stage surveys. b Percentage of agreement (three categories) between self-report and proxy-report at first-stage survey
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.