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.
Horizontal bar plot showing the quantification of the risk of potential bias across studies for each risk of bias domain, expressed as percentages, assessed with the Cochrane Collaboration’s tool for assessing risk of bias (RoB-2 tool). Green, low risk of potential bias; yellow, some concerns; red, high risk of potential bias.
