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Table 3 Genotypic and allelic frequencies of CYP1A2 −163A > C SNP in controls (Data from Skarke et al. [20]) and chronic migraine

From: Frequencies of genetic polymorphisms related to triptans metabolism in chronic migraine

−163A > C (CYP1A2*1F)

Migraine patients (n = 104)

n (%)

Healthy subjectsa (n = 495)

n (%)

χ2 (p)

Genotype

 CC

28 (26.9)

44 (8.9)

27 (<0.00001)

df = 2

 CA

42 (40.4)

227 (45.9)

 

 AA

34 (32.7)

224 (45.2)

 

Alleles

 C

98 (47.1)

315 (31)

17.8 (<0.00001)

df = 1

 A

110 (52.9)

675 (69)

 
  1. df degrees of freedom
  2. aData from Skarke et al. [20]