To the Editor We read with great interest the systematic review and meta-analysis by Chadi et al,1 who examined the association between electronic cigarette (e-cigarette) and marijuana use in adolescents and young adults, and they found that past or current e-cigarette users are more likely to be subsequent marijuana users. This finding signifies the importance of quitting e-cigarettes to curb the increasing use of marijuana among young people.
Wang G, Wang Y, Niu W. Underexplored Heterogeneity and Publication Bias for the Electronic Cigarette and Marijuana Use Association. JAMA Pediatr. 2020;174(5):504–505. doi:10.1001/jamapediatrics.2019.6080
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