E-Cigarette Use and Adult Cigarette Smoking Cessation: A Meta-Analysis.

To determine the association between e-cigarette use and smoking cessation. We searched PubMed, Web of Science Core Collection, and EMBASE and computed the association of e-cigarette use with quitting cigarettes using random effects meta-analyses. We identified 64 papers (55 observational studies and 9 randomized clinical trials [RCTs]).