During the past 30 days, on how many days did you use electronic cigarettes?
Categories
Value
Category
1
0 days
2
1 or 2 days
3
3 to 5 days
4
6 to 9 days
5
10 to 19 days
6
20 to 29 days
7
All 30 days
Sysmiss
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.
