| Value |
Category |
| 1 |
Use in 1st month |
| 2 |
Use in interv. prior |
| 3 |
Use in earlier intv. |
| 4 |
Only after 1st month |
| 5 |
Never used |
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.