Cohort study of electronic cigarette use: effectiveness and safety at 24 months.

ABSTRACT:

Objective

To evaluate the safety and effectiveness of e-cigarettes, by comparing users of only e-cigarettes, smokers of only tobacco cigarettes and dual users.

Design

Prospective cohort study. We update previous 12-month findings and report the results of the 24-month follow-up.

Data sources

Direct contact and questionnaires by phone or via internet.

Methods

Adults (30-75 years) were classified as: (1) tobacco smokers, if they smoked ≥1 tobacco cigarette/day, (2) e-cigarette users, if they inhaled ≥50 puffs/week of any type of e-cigarette and (3) dual users, if they smoked tobacco cigarettes and also used e-cigarettes. Carbon monoxide levels were tested in 50% of those declaring tobacco smoking abstinence. Hospital discharge data were used to validate possibly

SUBMITTER: Manzoli L 

PROVIDER: S-EPMC5520273 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature