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 curves after applying matching weights for overall survival (A), disease-free survival (B), and cumulative incidence of recurrence (C) for patients receiving no red blood cell (RBC) transfusion versus patients receiving a single-unit RBC transfusion. Numbers at risk refer to the original sample size (“No. at risk [unweighted]”) and the fractional number of patients after applying the matching weights (“No. at risk [weighted]”), reflecting the effective sample size.
