| Value |
Category |
| -95 |
|
| 1 |
Measured |
| 2 |
Not present |
| 3 |
Machine not working |
| 4 |
Too little blood drawn |
| 5 |
refused |
| Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.