| DS | Partially impacted | Fully impacted | |||
| N | % | N | % | ||
| Study group | Yes | - | - | 1 | 11.2 |
| No | 16 | 100.0 | 8 | 88.8 | |
| Total | 16 | 100.0 | 9 | 100.0 | |
| Control group | Yes | 3 | 18.8 | 4 | 44.4 |
| No | 13 | 81.2 | 5 | 55.6 | |
| Total | 16 | 100.0 | 9 | 100.0 | |
| Total | Yes | 3 | 9.4 | 5 | 27.8 |
| No | 29 | 90.6 | 13 | 72.2 | |
| Total | 32 | 100.0 | 18 | 100.0 | |