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ABSTRACT: Background
The e-cigarette market has rapidly evolved, with a shift towards higher nicotine concentration and salt-based products, such as JUUL; however, the implications for youth vaping remain unclear.Methods
Repeat cross-sectional online surveys were conducted in 2017, 2018 and 2019, with national samples of youth aged 16-19 years recruited from commercial panels in Canada (n=12 018), England (n=11 362) and the USA (n=12 110). Regression models examined differences between countries and over time in the types of e-cigarette products used (design and nicotine content), reasons for using brands and differences in patterns of use, sociodemographics and dependence symptoms by brand/nicotine content.Results
In 2019, the use of pod- or cartridge-style e-cigarett
SUBMITTER: Hammond D
PROVIDER: S-EPMC9359003 | biostudies-literature | 2023 Jan
REPOSITORIES: biostudies-literature