Glantz SA. E-cigarettes used by adolescents to try to quit smoking are associated with less quitting: A cross-sectional analysis of the National Youth Tobacco Survey Journal of Adolescent Health. Mar 2023. 72; 3: 359-364. “This study uses data from the NYTS from 2015 through 2021, focusing on youth who started smoking cigarettes before they started using e-cigarettes…

https://www.jahonline.org/article/S1054-139X(22)00706-6/fulltext

Ever-smoking youth who used e-cigarettes “to try to quit using other tobacco products, such as cigarettes,” had lower odds of stopping smoking cigarettes than those who did not use e-cigarettes to try to quit. Physicians, regulators, and educators should discourage youth from attempting to use e-cigarettes to stop smoking cigarettes.”

Comment: Past research suggests that e-cigarettes may reduce (my emphasis) smoking cessation rates, possibly by attracting smokers who want to quit but reducing the likelihood of quitting successfully.
Stephen Hamann