| Adult-onset CVS (n=446) | Paediatric-onset CVS (n=695) | |
| Age (mean years) | 34.0 | 8.3 |
| Age of onset (mean years) | 25.4 | 5.2 |
| Prevalence of headaches/migraines (%) | 56.0 | 40.5 |
| Family history of headache/migraine (%) | 56.0 | 27.8 |
| Co-existent anxiety/depression | 39.7 | 26.7 |
| Duration of CVS episode (mean days) | 5.9 | 3.4 |
| Frequency of CVS (episodes/month) | 1.2 | 0.8 |