Figure 3.
Funnel plot (publication bias assessment plot) of the odds ratio of lung cancer, by the standard error, for all studies. Circles: studies in the meta-analysis. Odds ratios are displayed on logarithmic scale.
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.