[Prevalence of electronic cigarette use and refill compositions among young people and adults in Cantabria].

Introduction: Electronic cigarettes (ECs) or vapes, have attracted interest among both young people and adults for recreational and social reasons. The aim of this study is to determine the prevalence of EC use by gender and age in Cantabria (northern Spain), as well as the composition of the refills. Material and methods: Cross-sectional study based on an anonymous, self-administered online questionnaire conducted from February to May 2025 (3 months). A total of 981 surveys were collected from individuals aged 15 to 64 years (inclusive). Results: The overall prevalence of recent use (in the last 30 days) was 4.2%, while lifetime use of EC was 16.2%. By age group, usage was highest among those under 35 years old (27.1% in the 15-24 age group and 24.4% in the 25-34 age group), and below 11% in older age groups. Regarding refill composition, nicotine-containing products were the most commonly used (44.7%), followed by nicotine-free and Conclusions: Methodological limitations aside regarding the representativeness of our sample in relation to the entire community, these findings are consistent with national data from the latest Survey on Alcohol and Drugs in Spain (EDADES 2024), highlighting the need to design targeted intervention strategies for the young population.