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.
Forest plot of subgroup analyses showing the effect of patient baseline characteristics and practice setting on the primary outcome for the usual care and intervention arms. Odds ratios, 95% confidence intervals, and P values are from analyses adjusted for site level variables included in the constrained randomization and account for clustering. HMO=health maintenance organization
