FIGURE 1.
Directed acyclic graph illustrating the relationship between household income (exposure), physical activity (mediator), and internalizing child mental health problems (outcome).
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.