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*Consistent with randomized trials and those observational studies that measure frequency of e-cigarette use, both quit attempts and quit success were positively associated with increased frequency of e-cigarette use. Frequency of e-cigarette use was important in gauging the nature of these relationships. | *Consistent with randomized trials and those observational studies that measure frequency of e-cigarette use, both quit attempts and quit success were positively associated with increased frequency of e-cigarette use. Frequency of e-cigarette use was important in gauging the nature of these relationships. | ||
*[https://sci-hub.st/10.1093/ntr/ntx166 PDF Version] | *[https://sci-hub.st/10.1093/ntr/ntx166 PDF Version] | ||
===2017: [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5520273/ Cohort study of electronic cigarette use: effectiveness and safety at 24 months]=== | |||
*Of the e-cigarette users, 61.1% remained abstinent from tobacco (while 23.1% and 26.0% of tobacco-only smokers and dual users achieved tobacco abstinence). | |||
*[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5520273/pdf/tobaccocontrol-2015-052822.pdf PDF Version] | |||
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