| Value | Category | Cases | |
|---|---|---|---|
| 1 | Scar present | 37 |
1.5%
|
| 2 | Scar absent | 5 |
0.2%
|
| 3 | No information | 1735 |
70.8%
|
| 5 | miss | 0 |
0%
|
| 9 | na | 674 |
27.5%
|
| Sysmiss | 353 |