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.
Scatter plot of observed frailty index scores vs those predicted in multivariable linear regression models including frailty short interview score, age at enrollment, gender, race, ethnicity, supplemental oxygen use at home, smoking status and study hospital.
