E-cigarette use was measured by asking participants what type of device they used in the past 30-days with pictures depicted next to the question of popular devices at the time data were collected [device options included vape pens, mod or mech mod rechargeable devices, box mod devices, JUUL, other (non-JUUL) pod devices, Puff Bar, other (non-Puff Bar) disposable devices)]
But the new Tobacco Control Act did not cover e-cigarettes, so in 2014, the FDA deemed them to be tobacco products to bring them under the Act
Twenty-one studies were designed as prospective cohort studies, and the remaining four studies were designed as retrospective cohort studies
This warrants further study in susceptible individuals, such as COPD patients who have switched from cigarettes to e-cigarettes or to new users of e-cigarettes who may never have used cigarettes. However, Professor John Britton, director of the UK Centre for Tobacco Control Studies said the most important point was that harm to the lungs was less from e-cigarettes than from tobacco
Carton Sleeve A carton sleeve is the outer packaging that holds multiple packs
