Fig. 3

CHIQ score in CH patients. Chronic CH patients showed highest CH scores (25.4 ± 7.9, n = 76), followed by active episodic CH patients (22.2 ± 8.7, n = 79) and episodic CH patients in remission (14.1 ± 13.1, n = 127). The CHIQ scores are significantly different between the three groups (H[2] = 41.3, p < 0.001). *, p < 0.05; **, p < 0.001. Abbreviations: CH, cluster headache