| Value | Category | Cases | |
|---|---|---|---|
| 1 | Chest only | 1165 |
35.4%
|
| 2 | Nose only | 1540 |
46.8%
|
| 3 | Both | 557 |
16.9%
|
| 6 | Other | 14 |
0.4%
|
| 8 | Don't know | 16 |
0.5%
|
| Sysmiss | 17672 |