Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
Description
Source of information
EC7. How many years ago did you first try an electronic cigarette, even once? [IF REFUSED, ENTER 99]
Imputation and derivation
Imputation
EC7. How many years ago did you first try an electronic cigarette, even once? [IF REFUSED, ENTER 99]
Others
Security
EC7. How many years ago did you first try an electronic cigarette, even once? [IF REFUSED, ENTER 99]