Figure 2.
Kaplan-Meier curves for mortality comparison with 95% confidence intervals. Curves depict the whole period from matching until the end of follow-up (maximum August 31). Colored areas represent 95% confidence intervals.
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.