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
EC8BDAYS. (How long has it been since you stopped using electronic cigarettes?) [ENTER NUMBER OF DAYS]
Imputation and derivation
Imputation
EC8BDAYS. (How long has it been since you stopped using electronic cigarettes?) [ENTER NUMBER OF DAYS]
Others
Security
EC8BDAYS. (How long has it been since you stopped using electronic cigarettes?) [ENTER NUMBER OF DAYS]