| Value | Category | Cases | |
|---|---|---|---|
| 1 | Angina | 1 |
10%
|
| 2 | Heart attack | 0 |
0%
|
| 3 | Heart failure | 2 |
20%
|
| 4 | Other | 1 |
10%
|
| 8 | Don't know | 6 |
60%
|
| 98 | Unknown | 0 |
0%
|
| 99 | Missing | 0 | |
| Sysmiss | 855 |