| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 3484 |
88.7%
|
| 2 | Mild | 259 |
6.6%
|
| 3 | Moderate | 124 |
3.2%
|
| 4 | Severe | 50 |
1.3%
|
| 5 | Extreme | 13 |
0.3%
|
| Sysmiss | 8 |