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
C13BYEARS. (How long has it been since you stopped using smokeless tobacco?) [ENTER NUMBER OF YEARS]
Imputation and derivation
Imputation
C13BYEARS. (How long has it been since you stopped using smokeless tobacco?) [ENTER NUMBER OF YEARS]
Others
Security
C13BYEARS. (How long has it been since you stopped using smokeless tobacco?) [ENTER NUMBER OF YEARS]
