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The 13th World Conference on Tobacco OR Health
Building capacity for a tobacco-free world
July 12-15, 2006, Washington, DC, USA
Objective: After effective tobacco control measures adopted by developed countries, tobacco industry increased investments on developing country markets. The use of “light” descriptors in cigarette packs is one of industry strategies to increase tobacco consumption. The objective of this study is to describe the differences between smokers of “light” and “regular” cigarettes in the pooled population of a multicenter study conducted in Brazil, Poland, China and Mexico.
Methods: Data from smoking behaviors and salivary cotinine were collected following a standard protocol, although sample design was different by country. Linear regression model was used to describe the change in cotinine concentration per cigarette smoked, adjusting for age, BMI, and country of residence and to test interaction between cigarettes smoked in the last 24 hours, type of cigarette and some selected variables.
Results: For the total population, compared to smokers of "regular" cigarettes a greater percentage of "light" cigarette smokers are females (P < 0.001). There is no difference regarding age, BMI and number of cigarette smoked in the past 24 hours. Among women smoking up to 20 cigarettes, no difference was observed in the increase of salivary cotinine levels per cigarette smoked, in both crude or adjusted model. For males, a small difference was observed in the adjusted model. The three way interactions between number of cigarettes smoked in the last 24 hours, type of cigarettes and selected variables – BMI, gender, depth of inhaling, frequency of inhaling and time to smoke the first cigarette after waking up wasn't significant.