| Value | Category | Cases | |
|---|---|---|---|
| 1 | Chest only | 225 |
25.3%
|
| 2 | Nose only | 104 |
11.7%
|
| 3 | Both | 533 |
60%
|
| 6 | Other | 8 |
0.9%
|
| 8 | Don't know | 19 |
2.1%
|
| 9 | 31 | ||
| Sysmiss | 17501 |