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
B04. How old were you when you first started smoking tobacco daily? [IF DON'T KNOW OR REFUSED, ENTER 99]
Imputation and derivation
Imputation
B04. How old were you when you first started smoking tobacco daily? [IF DON'T KNOW OR REFUSED, ENTER 99]
Others
Security
B04. How old were you when you first started smoking tobacco daily? [IF DON'T KNOW OR REFUSED, ENTER 99]
