Value | Category |
---|---|
1 | less than one week |
2 | 1 week or more but less than a month |
3 | 1 month or more but less than 3 months |
4 | 3 months or more but less than 6 months |
5 | 6 months or more but less than 1 year |
6 | 1 year or more but less than 2 years |
7 | 2 years or more |
8 | duration is unspecified |
Sysmiss |