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
Thinking about the last time you tried to quit, how long did you stop smoking? [ENTER UNIT]
Imputation and derivation
Imputation
Thinking about the last time you tried to quit, how long did you stop smoking? [ENTER UNIT]
Others
Security
Thinking about the last time you tried to quit, how long did you stop smoking? [ENTER UNIT]