| Value | Category | Cases | |
|---|---|---|---|
| 1 | I did not use public transportation during the past 7 days | 789 |
35.2%
|
| 2 | I used public transportation but no one smoked in my presence | 877 |
39.1%
|
| 3 | 1 to 2 days | 358 |
16%
|
| 4 | 3 to 4 days | 95 |
4.2%
|
| 5 | 5 to 6 days | 64 |
2.9%
|
| 6 | 7 days | 61 |
2.7%
|
| Sysmiss | 13 |