Clinical trial shows that giving smokers free e-cigarettes creates more dual users than switchers or quitters

Abstract

Carpenter et al. reported a naturalistic randomised controlled trial evaluating the effect of giving smokers free e-cigarettes on stopping cigarettes six month later.1 Significantly more smokers randomized to e-cigarettes stopped smoking (17% = 9% switchers +8% quitters) than in the control group (stopped smoking: 9% = 3% switchers +6% quitters), but there was no significant difference in having quit completely (e-cigarette: 8%; control: 6%) (Table 1). Significantly more smokers randomized to e-cigarettes (45%) became dual users than in the control group (11%).

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