| Value | Category | Cases | |
|---|---|---|---|
| 0 | measured | 3814 |
98.3%
|
| 3 | not present | 33 |
0.9%
|
| 4 | refused | 8 |
0.2%
|
| 6 | other | 24 |
0.6%
|
| Sysmiss | 37 |