The questionnaire included informat

The questionnaire included information on demographics (age, gender, education, income); use of smoking
tobacco and of smokeless tobacco; cessation attempts and
interest in quitting; exposure to secondhand smoke;
purchase of cigarettes during the last 30 days; exposure to
media that provided information on smoking and health
effects; questions about pictorial warning labels on
manufactured cigarette packs, and knowledge, attitudes,
and perceptions about tobacco use. Some questions were
added by the Thailand GATS working group and reviewed
by the Thailand GATS expert committee [9]. GATS protocols were approved by the Ethics Committee of the Faculty
of Public Health, Mahidol University.