| Value |
Category |
| 1 |
1 - 4 days |
| 2 |
16 - 24 days |
| 3 |
25 - 30 days |
| 4 |
5 - 8 days |
| 5 |
9 - 15 days |
| 6 |
I have not been exposed to cigarettes smoking in the last 30 days |
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.