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Table 1 Clinical characteristics of patient group based on their OPRM-1 A118G genotype

From: The human μ-opioid receptor gene polymorphism (A118G) is associated with head pain severity in a clinical cohort of female migraine with aura patients

Variable A/A carriers A/G, G/G carriers
No. of patients 119 34
Age in years, mean (±SD) 43 (±14) 44 (±14)
Head pain score, median (range) 7 (1–10) 8 (3–10)
High head pain (%) 37 64.7