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
D01. The next questions ask about any attempts to stop smoking that you might ha
Imputation and derivation
Imputation
D01. The next questions ask about any attempts to stop smoking that you might ha
Others
Security
D01. The next questions ask about any attempts to stop smoking that you might ha