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Table 4 Combined genotypic frequencies of GRIA1 (CT) and GRIA3 (TC)

From: Common variants in the regulative regions of GRIA1 and GRIA3 receptor genes are associated with migraine susceptibility

  C ONTROLS N = 260 CASES N = 244 P-VALUE OR 95% CI
TWO RISK ALLELES 6+3+31+9 (19%) 24+6+29+22 (33%) 0.00001 3.35 1.96-5.74
ONE RISK ALLELE (GRIA1) 26+74 (39%) 20+63 (34%) 0.03 1.68 1.02-2.77
ONE RISK ALLELE (GRIA3) 26+14 (15%) 27+18 (19%) 0.005 2.28 1.27-4.11
NO RISK ALLELE 71 (27%) 35 (14%)    
  1. Genotypes for two risk alleles were: TT/TC + TT/CC + CT/TC + CT/CC; one risk allele (GRIA1): TT/TT + CT/TT; one risk allele (GRIA3): CC/TC + CC/CC; no risk allele: CC/TT.