Figure 1.
Participants flow chart for U.S. older adults (≥65 years) from the National Health and Nutrition Examination Survey (2005–2016).
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.