The Khon Kaen Cohort Study was started in 1990
and recruited 25,000 subjects from a rural population in
North-East Thailand (Sriamporn et al., 2005). Here we
investigate the association between smoking and mortality
separately by type of cigarette and dose. The major
tobacco products used in this population are hand-rolled
cigarettes (yamuan) and manufactured cigarettes (Sarunya
et al., 2012) and this study provides an opportunity to
examine any variations in risk associated with these
different types of cigarette.