| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | no | 10253 |
98.9%
|
| 1 | yes: don't know which drug taken | 92 |
0.9%
|
| 8 | don't know | 8 |
0.1%
|
| 9 | 11 |
0.1%
|
|
| Sysmiss | 6723 |