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Meta-Analysis
.2009 Aug;29(8):818-25.
doi: 10.1111/j.1468-2982.2007.01400.x. Epub 2007 Aug 21.

Association of the C677T polymorphism in the MTHFR gene with migraine: a meta-analysis

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Meta-Analysis

Association of the C677T polymorphism in the MTHFR gene with migraine: a meta-analysis

E Rubino et al. Cephalalgia.2009 Aug.

Abstract

There are conflicting data concerning the association between migraine and C677T polymorphism of the MTHFR gene. The C677T polymorphism reduces enzymatic capability by 50% and causes hyperhomocysteinaemia. We performed a meta-analysis of all published studies investigating the association between the MTHFR gene and migraine. Pooled odds ratios (OR) were estimated using random (RE) and fixed effects (FE) models. Among the overall 2961 migraineurs there was no significant difference compared with controls. Only in migraine with aura was the TT genotype associated with a higher risk of disease compared with the CC genotype [FE OR 1.30, 95% confidence interval (CI) 1.06, 1.58; RE OR 1.66, 95% CI 1.06, 2.59]. In the same subgroup a significant difference was observed in the comparison between TT and CT + CC genotypes (FE OR 1.32, 95% CI 1.10, 1.59; RE OR 1.63, 95% CI 1.10, 2.43). This study provides evidence for an association of the MTHFR gene only in migraine with aura.

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