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.
ROC curve of external validation data set. ROC curve for the (A) 6-month prognostic model; (B) 1-year prognostic model; (C) 2-year prognostic model in external validation data set. ROC: Receiver operating characteristic, AUC: the area under the curve.
