The Danes' Smoking Habits survey, conducted from September 24, 2019 to December 31, 2019, collected data on the smoking habits of participants by age, sex, education, and region of residence. It covered the consumption of cigarettes and other tobacco products (including e-cigarettes), tobacco dependence, smoking cessation, nicotine replacement therapy (NRT) usage, purchasing activity, and smoking around others. 

Participants were aged 15 to 79 years, and 11,945 individuals completed the questionnaire via a computer or telephone interview. The population of Denmark at the time the survey was conducted approximated 4,600,514 people.