Cluster attack: characteristics
| Women | Men | p Value | |
| Cluster attack: | |||
| Frequency (No/day (SD)) | 3.2 (1.7) | 30 (1.5) | 0.549 |
| Duration (min (SD)) | 67.2 (32.0) | 88.2 (62.0) | 0.074 |
| Cluster period: | |||
| Duration (weeks (SD)) | 11.1 (6.1) | 10.0 (7.9) | 0.614 |
| Remissions: | |||
| Duration (months (SD)) | 21.1 (24.9) | 23.1 (30.5) | 0.945 |