Chronic cluster headache: a French clinical descriptive study.

Area of Science:

• Neurology
• Headache Medicine
• Clinical Research

Background:

• Cluster headache (CH) is a rare neurological disorder, with chronic CH being less common than episodic CH.
• Limited research exists on the specific characteristics of patients experiencing chronic CH.
• Understanding chronic CH is crucial for improving patient diagnosis and management.

Purpose of the Study:

• To describe the clinical characteristics of patients with chronic cluster headache.
• To identify potential risk factors and associated symptoms in chronic CH.
• To compare primary and secondary chronic CH presentations.

Main Methods:

• A descriptive study involving 113 chronic CH patients from eight French specialist headache centers.
• Data collected between January and June 2005 using standardized questionnaires.
• Part of the Observatory of Migraine and Headaches (OMH) initiative, which collected data from 2074 CH patients overall.

Main Results:

• The male to female ratio was 4.65:1, with a median age of 42 years.
• 87% of patients were current or former smokers; 46% had primary chronic CH, and 54% had secondary chronic CH.
• 74% reported severe functional impact, 75.7% suffered from anxiety, and 20% reported auras.

Conclusions:

• Confirms auras, interictal symptoms, male sex, and smoking as features of chronic CH.
• Primary and secondary chronic CH are similarly prevalent.
• Male sex does not appear to influence the transition from episodic to chronic CH.