| Value |
Category |
| 1 |
less than 0.5 hour |
| 2 |
0.5-1 hour |
| 3 |
1-4 hours |
| 4 |
4-8 hours |
| 5 |
more than 8 hours |
| 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.