| Value | Category | Cases | |
|---|---|---|---|
| 1 | I did not use public transportation during the past 7 days | 589 |
28.8%
|
| 2 | I used public transportation but no one smoked in my presence | 809 |
39.5%
|
| 3 | 1 to 2 days | 315 |
15.4%
|
| 4 | 3 to 4 days | 115 |
5.6%
|
| 5 | 5 to 6 days | 98 |
4.8%
|
| 6 | 7 days | 121 |
5.9%
|
| Sysmiss | 29 |