Concurrent E-cigarette use During Tobacco Dependence Treatment in Primary Care Settings: Association
Thursday, September 8, 2016
Posted by: Natalia Gromov
Laurie Zawertailo, Dmytro Pavlov, Anna Ivanova, Ginnie Ng, Dolly Baliunas, and Peter Selby.
Concurrent E-cigarette use During Tobacco Dependence Treatment in Primary Care Settings: Association with Smoking Cessation at 3- and 6-months.
Nicotine Tob Res (2016)doi: 10.1093/ntr/ntw218First published online: August 31, 2016
Electronic cigarettes (e-cigarettes) are being used as cessation aids by many smokers despite a lack of empirical evidence regarding their safety and efficacy. We analyzed the association of e-cigarette use and smoking abstinence in a population of smokers accessing standard smoking cessation treatment (nicotine replacement therapy plus behavioral counseling) through primary care clinics in Ontario, Canada. Participants were recruited through 187 primary care clinics across Ontario, Canada and were eligible for up to 26 weeks of brief behavioural counseling and individualized dosing of nicotine replacement therapy at no cost. Adjusted logistic regression models were used to examine the association between concurrent e-cigarette use and smoking abstinence at 3- and 6-month follow-ups. Of the 6526 participants who completed a 3-month follow-up 18.1% reported using an e-cigarette while in treatment. The majority of e-cigarette users (78.2%) reported using an e-cigarette for smoking cessation. At 3-month follow-up, e-cigarette use was negatively associated with abstinence after controlling for confounders (AOR=0.706, p<0.001, 95%CI=0.607-0.820). E-cigarette use was also negatively associated with abstinence at 6-month follow-up (AOR=0.502, p<0.001, 95%CI=0.393-0.640). E-cigarette use was negatively associated with successful quitting in this large community sample of smokers accessing standard evidence-based smoking cessation treatment through primary care clinics, even after adjusting for covariates such as severity of tobacco dependence, gender and age. The findings suggest that concurrent use of e-cigarettes with NRT may harm cessation attempts. This study confirms previous findings from observational studies regarding the negative association between e-cigarette use and smoking cessation, but in a large cohort of smokers enrolled in an evidence-based treatment program. The implications of these findings are that concurrent use of e-cigarettes during a quit attempt utilizing cost-free evidence-based treatment (nicotine replacement therapy plus behavioural counseling) does not confer any added benefit and may hamper successful quitting.