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.
Receipt of radiation after breast-conserving surgery by recurrence risk and Surveillance, Epidemiology, and End Results Registry site. Proportions adjusted for age, education, race, and medical comorbidity (n = 442; Wald test for interaction between recurrence risk group and site, 12.4; P = .006).
