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.
c statistic (a generalization of the area under the receiver operating characteristic curve for ordinal models) plotted against cutoff points to divide high volume providers from low volume providers. The c statistic for all possible cutoff points is within the 95% confidence interval for the best cutoff point, indicating that the data fail to support a unique caseload value under which patient outcomes are evidently inferior.
