Figure 1

Differences in the estimates of the prevalence of current smoking according to the type of population sampled, in comparison with samples of the general population with national representativeness, in women and men. The prevalences were estimated using sex-specific models including the prevalence of smoking as dependent variable and the type of population, the mean age of participants (continuous variable), the year of survey (continuous variable), the geographical coverage of the study (national/regional, categorical variable) and the smoking measurement (current smoking/daily smoking, categorical variable) of the study as independent variables.