| Value | Category | Cases | |
|---|---|---|---|
| 1 | days | 0 |
0%
|
| 2 | months | 4 |
66.7%
|
| 3 | years | 2 |
33.3%
|
| 4 | special/inconsistent | 0 |
0%
|
| 8 | don't know | 0 |
0%
|
| 9 | not applicable | 0 |
0%
|
| 9999995 | missing:impute | 0 |
0%
|
| Sysmiss | 3611 |