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.
Percent difference in source attribution proportions between urban and rural populations (urban cases as references) for eight models (M1, M2, M5–M10). See Table 1 for model details. Vertical bars are 95% credible intervals (CrI). Note that all CrIs include 0% (no difference).
