Examining socio-economic disparities among e-cigarette users and cigarette smokers in three Canadian jurisdictions

It is well established that a gradient exists among cigarette smokers, such that smoking is more prevalent among individuals who are of lower socio-economic status (SES). In this study, we examined whether a similar SES gradient exists among electronic cigarette (e-cigarette) using youth and adults in three Canadian jurisdictions.

A secondary analysis of data from Ontario, Quebec and Yukon respondents (n = 58,592) to the 2017-2018 Canadian Community Health Survey was conducted. Unadjusted and adjusted logistic regression models explored SES measures: total and relative household income, and education level, separately on use of e-cigarettes or cigarettes in the past 30 days. Models adjusted for additional socio-demographic and psychosocial covariates.

A significant inverse SES gradient existed for cigarette smoking based on education and income variables, with higher education and income associated with decreasing consumption in a stepwise manner. No SES gradient was observed for e-cigarettes.

While a robust SES gradient was observed among cigarette smokers, no gradient for e-cigarette use was observed. Explanations for these findings may be linked to perceptions that e-cigarettes are healthier, have convenient designs and appealing flavours, and less stigmatised. As more becomes known about potential harms from e-cigarettes, effective interventions may be needed to prevent the emergence of a gradient that disproportionately affects those at lowest income and education levels. Continued monitoring of e-cigarette use patterns across SES groups is necessary for public health.