| Value | Category | Cases | |
|---|---|---|---|
| 1 | Blood taken | 3849 |
85.6%
|
| 2 | Not present | 115 |
2.6%
|
| 3 | Refused | 448 |
10%
|
| 4 | Sample not tested/lost | 28 |
0.6%
|
| 5 | Not enough DBS to complete protocol | 0 |
0%
|
| 6 | Other | 59 |
1.3%
|
| Sysmiss | 34016 |