Table 5 Meta-analysis summary odds ratios (95% CI) for the association of the T allele homozygosity with migraine

(15 studies)

(15 studies)

(4 studies)

N = 4,365 cases

N = 3,862 cases

N = 503 cases

N = 30,110 controls

N = 30,110 controls

N = 674 controls

All studies

1.37 (1.07-1.76) ^"a"

1.42 (1.10-1.82) ^"a"

1.16 (0.36-3.76)

Excluding 1 study of women only ^"b"

1.46 (1.11-1.92) ^"a"

1.54 (1.17-2.02) ^"a"

1.16 (0.36-3.76)

Ethnic ancestry

   European

1.20 (0.95-1.53)

1.28 (1.002-1.63) ^"a"

0.73 (0.24-2.24)

   Non-European

3.46 (1.22-9.82) ^"a"

2.81 (0.84-9.44)

------- ^"c"