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Proportions of subjects who achieved pain-free (A) or responder (B) status in ≥50% of treated attacks at 15 minutes (ITT population). (a) Pain-free status. (b) Responder status.
p values were determined from the chi-square or Fisher’s exact test, as appropriate.
Abbreviations: cCH: chronic cluster headache; CH: cluster headache; eCH: episodic cluster headache; ITT: intent-to-treat; nVNS: non-invasive vagus nerve stimulation.
