From: A common cause of sudden and thunderclap headaches: reversible cerebral vasoconstriction syndrome
Current study | Perry[5] | Landtblom[4] | Linn[3] | Harling[26] | |
---|---|---|---|---|---|
SAH | 3.3% | 6.2% | 11.3% | 25% | 71.4% |
No diagnosis | 19.4% | 57.7% | 73.0% | 62.8% | 2.0% |
(3.3%)* | |||||
Onset | sudden | < 1 hour | sudden | < 1 minute | sudden |
Intensity | NS | NS | NS | Severe | NS |
Duration | > 1 minute | NS | NS | > 1 hour | NS |
Onset to visit | < 30 days | < 14 days | NS | NS | NS |
Settings | Clinic | Emergency department | Emergency department | Clinic and emergency | In-hospital |
Follow up | 6-42 months | 6 months | 12 months | 12 months | 18-30 months |
Further SAH | 0 | 0 | 0 | 0 | 0 |