Figure 1.
Meta-analysis [RR (95% CI)] of interventions to prevent physician-diagnosed asthma. Error bars indicate 95% CIs.
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.