Imploding and exploding migraine headaches: comparison of methods to diagnose pain directionality

Area of Science:

• Neurology
• Pain Medicine
• Women's Health

Background:

• Headache directionality (imploding, exploding, ocular) in migraine may indicate varied pathogenesis.
• Pain directionality might predict response to onabotulinumtoxin A treatment.
• Optimal methods for assessing migraine headache directionality are not well-established.

Purpose of the Study:

• To compare methods of determining headache directionality in women with migraine.
• To assess concordance between physician and patient self-assignment of pain directionality.
• To evaluate consistency of patient-reported directionality across different assessment methods.

Main Methods:

• Prospective cross-sectional survey of 198 female migraine patients.
• Patients self-assigned headache directionality using graphical images and a written question.
• Clinicians assigned headache directionality via structured interviews.
• Concordance assessed using Kappa coefficients.

Main Results:

• Substantial variation in headache directionality assignment based on the determination method.
• Weak concordance (Kappa coefficients 0.33-0.35) between clinician and patient assignments.
• Weak concordance between patient self-assignment methods (written vs. graphical).

Conclusions:

• Headache directionality assignment in migraine is method-dependent.
• Current methods show weak agreement between patients and clinicians.
• Development of improved, reliable methods for determining headache directionality is necessary.