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MigSCog scores of MOH and migraine patients with or without IBS. Co-existence of IBS is significantly associated with higher cognitive dysfunction scores in EM and MOH patients, *: p < 0.01. MigSCog, migraine attack subjective cognitive impairments scale; CM, Chronic migraine; EM, Episodic migraine; MOH, Medication overuse headache; IBS, Irritable bowel syndrome; NS: Not significant).
