| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 3603 |
81.8%
|
| 2 | Mild | 459 |
10.4%
|
| 3 | Moderate | 247 |
5.6%
|
| 4 | Severe | 74 |
1.7%
|
| 5 | Extreme | 23 |
0.5%
|
| Sysmiss | 11 |