Value |
Category |
1 |
None |
2 |
Less than 30' |
3 |
30' - 1 hr |
4 |
1-2 hrs |
5 |
2-3 hrs |
6 |
3-4 hrs |
7 |
>4 hrs |
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.