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We assessed associations between e- cigarette use and smoking intentions among US youth who had never smoked conventional cigarettes. Intentions to smoke cigarettes among never- smoking US middle and high school electronic cigarette users: National Youth Tobacco Survey, 2011-2013.īunnell, Rebecca E Agaku, Israel T Arrazola, RenÃ© A Apelberg, Benjamin J Caraballo, Ralph S Corey, Catherine G Coleman, Blair N Dube, Shanta R King, Brian AĮlectronic cigarette (e- cigarette) use is increasing rapidly, and the impact on youth is unknown. No consistent interactions between marijuana effects and social or private periods (i.e., time of day) were observed. Marijuana decreased the number of tobacco smoking bouts by delaying the initiation of tobacco cigarette smoking immediately after marijuana smoking, whereas decreases in inter-puff intervals were unrelated to the time of marijuana smoking. Active marijuana smoking significantly decreased the number of daily tobacco smoking bouts, increased inter-bout intervals and decreased inter-puff intervals. Each subject was exposed to both placebo and one active dose over 2- to 5-consecutive-day intervals, and dose conditions (i.e., placebo or active) alternated throughout the study. Under blind conditions, subjects smoked placebo and active marijuana cigarettes (0%, 1.3%, 2.3%, or 2.7% delta 9-tetrahydrocannabinol) four times daily (9:45 A.M., 1:30 P.M., 5:00 P.M. to midnight), during which subjects could interact. to 5:00 P.M.), during which subjects were socially isolated, and a social period (5:00 P.M. Each day was divided into a private period (9:00 A.M. Tobacco cigarettes were available throughout the day (9:00 A.M. Eight healthy adult male volunteers, who smoked both tobacco and marijuana cigarettes, participated in residential studies, lasting 10 to 15 days, designed to measure the effects of marijuana smoke exposure on a range of behavioral variables. The effects of marijuana smoke exposure on several measures of tobacco cigarette smoking behavior were examined.

Kelly, T H Foltin, R W Rose, A J Fischman, M W Brady, J V Smoked marijuana effects on tobacco cigarette smoking behavior.

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