| Value |
Category |
Cases |
|
| -9 |
Don't know (spontaneous) |
1 |
|
| 1 |
One month or less |
19 |
|
| 2 |
|
1 |
|
| 3 |
|
1 |
|
| 9 |
|
1 |
|
| 12 |
|
3 |
|
| Sysmiss |
|
77 |
|
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.
