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.
Age-adjusted prevalence of frailty among adults aged ≥60 years by districts, China Health and Retirement Longitudinal Study, 2011. Weighted prevalence was estimated at the weighted mean age in each district.