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.
Estimated percent days of cannabis use (from timeline follow back assessments) during the 90 days prior to each assessment time point from piecewise analysis. ETX = end of treatment.
c: THERAPIST vs. COMPUTER is significant (9M: t(1.98)=2.02, p=0.04)
