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.
Summary-ROC (SROC) curve for diagnostic accuracy of the absence of lung sliding sign in ultrasound in diagnosis of pneumothorax. Size of each circle on graph represents the sample size of included study. SE = standard error; Q∗ index = point at which sensitivity and specificity are equal or point closest to the ideal top-left corner of SROC space.
