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.
Time-varying effect model predicting momentary smoking after quit attempt by monotherapy and combination therapy compared with placebo. Dotted lines indicate 95% confidence intervals. Time is measured and analyzed continuously but is labeled in daily intervals for ease of presentation.
