Correlates of e-cigarette use before and after comprehensive regulatory changes and e-liquid flavour ban among general population.

In Finland, the regulated entry of nicotine-containing e-liquids to retail sales has not led to increased e-cigarette use in the general population. After the flavour ban, other than tobacco-flavoured e-cigarette use still occurs. The use of flavoured e-cigarettes is associated with reasons for e-cigarette use. Flavoured e-cigarette use and its correlates warrant further monitoring.