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.
Note. Points indicate observed values (restricted to participants who attended any sessions). Lines give model-predicted number of attended sessions (conditional on attending any sessions) for different values of the predictor variables after holding other predictor variables constant.
