GRIA1 and migraine disorder: In addition, subgroup analysis based on ethnicity showed that GRIA1 rs2195450 C>T polymorphism was significantly associated with migraine risk in Asian population ((TT+CT) vs. CC, OR = 1.83, 95%CI = 1.26–2.66, PZ = 0.001; CT vs. CC, OR = 1.75, 95%CI = 1.19–2.57, PZ = 0.005; T vs. C, OR = 1.79, 95%CI = 1.28–2.49, PZ = 0.0006), but not in Caucasian population.