| Value | Category | Cases | |
|---|---|---|---|
| 1 | Chest only | 904 |
35.4%
|
| 2 | Nose only | 1196 |
46.9%
|
| 3 | Both | 431 |
16.9%
|
| 6 | Other | 9 |
0.4%
|
| 8 | Don't know | 11 |
0.4%
|
| Sysmiss | 28528 |