Figure 2.
Quality assessment based on the QUADAS-2 guidelines. Graphical representation of the risk of bias and applicability concerns. QUADAS-2 = Quality assessment of Diagnostic Accuracy Studies.
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.