| Value |
Category |
Cases |
|
| -9 |
Don't know (spontaneous) |
0 |
|
| 1 |
One month or less |
1 |
|
| 2 |
|
2 |
|
| 4 |
|
4 |
|
| 5 |
|
2 |
|
| Sysmiss |
|
510 |
|
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.
