| Value | Category | Cases | |
|---|---|---|---|
| 1 | it lasted less than 10 minutes | 50 |
8.8%
|
| 2 | it lasted between 10 and 30 minutes | 298 |
52.4%
|
| 3 | it lasted more than 30 minutes | 221 |
38.8%
|
| Sysmiss | 943 |