| Value | Category | Cases | |
|---|---|---|---|
| 1 | Venepuncture | 25 |
30.1%
|
| 2 | Filter paper | 28 |
33.7%
|
| 3 | Mitra Device | 26 |
31.3%
|
| 4 | Neither | 0 |
0%
|
| 5 | All | 4 |
4.8%
|
| Sysmiss | 767 |