Results: The prevalence of current smoking among Thai adults was 45.6% for men and 3.1% for women. In all,
18.4% of men and 1.0% of women were current users of manufactured cigarettes only, while 15.8% of men and
1.7% of women were current users of RYO cigarettes only. 11.2% of men and 0.1% of women used both RYO and
manufactured cigarettes. Users of manufactured cigarettes were younger and users of RYO were older. RYO
smokers were more likely to live in rural areas. Smokers of manufactured cigarettes appeared to be more
knowledgeable about the health risks of tobacco use. However, the difference was confounded with age and
education; when demographic variables were controlled, the knowledge differences no longer remained. Smokers
of manufactured cigarettes were more likely than dual users and those who used only RYO to report that they
were planning on quitting in the next month. Users of RYO only appeared to be more addicted than the other two
groups as measured by time to first cigarette.