| Value | Category | Cases | |
|---|---|---|---|
| 1 | Blood taken | 2403 |
78.2%
|
| 2 | Not present | 195 |
6.3%
|
| 3 | Refused | 396 |
12.9%
|
| 4 | Sample not tested/lost | 19 |
0.6%
|
| 5 | Not enough DBS to complete protocol | 0 |
0%
|
| 6 | Other | 61 |
2%
|
| Sysmiss | 5983 |