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
Did each pack contain 5 cigarettes, 6 cigarettes, 10 cigarettes, 20 cigarettes, or another amount
Imputation and derivation
Imputation
Did each pack contain 5 cigarettes, 6 cigarettes, 10 cigarettes, 20 cigarettes, or another amount
Others
Security
Did each pack contain 5 cigarettes, 6 cigarettes, 10 cigarettes, 20 cigarettes, or another amount