| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 887 |
89.9%
|
| 2 | Mild | 75 |
7.6%
|
| 3 | Moderate | 9 |
0.9%
|
| 4 | Severe | 12 |
1.2%
|
| 5 | Extreme | 4 |
0.4%
|
| Sysmiss | 2951 |