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Nevertheless, while stratification by smoking status is important for interpretations of inequalities in vaping, stratification can also introduce a phenomenon known as collider bias [36, 37], which can arise when conditioning on a variable that is determined by both the exposure of interest and other variables that determine the outcome of interest

The Interstate Revenue Research Center is devoting a percentage of its time to each segment of this spectrum.[75] [70] "Interstate Revenue Research Center," 49th Annual Meetings, 24

Cigarette filters, often made with non-biodegradable materials, contribute to environmental pollution

E-cigs aerosolize PG and VG into PM to deliver nicotine and/or flavors to the lungs

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