422
Participants
Start Date
May 25, 2016
Primary Completion Date
January 9, 2018
Study Completion Date
January 9, 2018
text-only PWL
control condition (no image)
graphic PWL
pictorial warning
absolute risk
Percentage risk information for smoking-related diseases for smokers
relative risk
Percentage risk information for smoking-related diseases for smokers and non-smokers
University of Pennsylvania
OTHER
Ohio State University
OTHER