All data were tested for normal distribution using three normality tests (AndersonDarling, DAgostinoPearson omnibus, and ShapiroWilk)
A personalized click-to-quit service that sends regular quit messages to your phone or email
The price difference per cigarette between 10s and 20s might not look huge, but over weeks and months, it really makes a dent
When a user lights up a cigarette, smoke is produced for the user to inhale
The study products included: Product A: Classic Tobacco flavored e-cigarette (2.4 % nicotine, ~75 % glycerin) Product B: Classic Tobacco flavored e-cigarette (2.4 % nicotine, ~50 % glycerin/~20 % propylene glycol) Product C: Menthol flavored e-cigarette (2.4 % nicotine, ~75 % glycerin) Product D: Classic Tobacco flavored e-cigarette (1.6 % nicotine, ~75 % glycerin) Product E: Classic Tobacco flavored e-cigarette (1.6 % nicotine, ~50 % glycerin/~20 % propylene glycol) Product F: Tobacco Cigarette Study design This was a randomized, partially single-blinded, six-period crossover study conducted at a single independent research center (Celerion, Lincoln, NE)
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