FIGURE 7.
Funnel plot of the systolic blood pressure of 12 trials selected from all the 17 trials shows no significant evidence of asymmetry. MD = mean difference.
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.