| Value |
Category |
| 1 |
less than half an hour |
| 2 |
half hour to 24 hours |
| 3 |
more than 24 hours |
| 4 |
no severe chest pain |
| 8 |
don't know |
| 9 |
|
| 11 |
.Z |
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.