| Value | Category | Cases | |
|---|---|---|---|
| 1 | Blood taken | 555 |
77.8%
|
| 2 | Not present | 58 |
8.1%
|
| 3 | Refused | 71 |
10%
|
| 4 | Sample not tested/lost | 6 |
0.8%
|
| 5 | Not enough DBS to complete protocol | 0 |
0%
|
| 6 | Other | 23 |
3.2%
|
| Sysmiss | 8344 |