| Value | Category | Cases | |
|---|---|---|---|
| 1 | Chest only | 296 |
24.9%
|
| 2 | Nose only | 423 |
35.6%
|
| 3 | Both | 428 |
36.1%
|
| 6 | Other | 11 |
0.9%
|
| 8 | Don't know | 29 |
2.4%
|
| 9 | Missing | 9 | |
| Sysmiss | 103612 |