Intra- and interindividual attack frequency variability of chronic cluster headache.
Roemer B BrandtWim MullenersLeopoldine A WilbrinkPaul BrandtErik W van ZwetFrank Jpm HuygenMichel D FerrariRolf Fronczeknull nullPublished in: Cephalalgia : an international journal of headache (2023)
Weekly retrospective attack frequency recording is as good as instantaneous recording and more convenient. Attack frequency is highest in spring. Participants with ≥3 daily attacks show less attack frequency variability than those with <3 daily attacks. An optimal balance between 90% accuracy and feasibility is achieved at a baseline period of seven weeks.The ICON trial is registered in ClinicalTrials.gov under number NCT01151631.