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.
Receiver Operating Characteristic (ROC) curves for diagnosing gastric cancer (A) and atrophic gastritis (B). The blue line indicates PGI and the red line indicates PGR. A green line is reference line. PGI, pepsinogen I; PGR, pepsinogen I to pepsinogen II ratio.
