Chunk #7 — Methods — Smoking Phenotypes

Source

Nicotinic receptor gene variants influence susceptibility to heavy smoking.

Embedded

yes

Text

Information on smoking behavior from questionnaires administered in 1982, 1992, and 1997 was used to identify light and heavy smokers among participants with a DNA sample. To be considered for inclusion in this study, participants had to have reported smoking more than 100 cigarettes in their lifetime.