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.
Kaplan–Meier survival curves by smoking status. Data were analyzed for A) all-cause mortality, B) breast cancer mortality, and C) breast cancer recurrence. Tables of the number of patients at risk in each group at various time points are below each graph.
