alexa Association of vitiligo with HLA-A2: a meta-analysis.
Dermatology

Dermatology

Dermatology and Dermatologic Diseases

Author(s): Liu JB, Li M, Chen H, Zhong SQ, Yang S, , Liu JB, Li M, Chen H, Zhong SQ, Yang S,

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Abstract BACKGROUND: Linkage and association studies suggest that the human leucocyte antigen (HLA) region may be involved in the genetic susceptibility of vitiligo. HLA-A2 has been reported to be associated with vitiligo in some, but not all, studies. OBJECTIVE: To identify sources of the heterogeneity among studies and to quantify effect estimates, we examined the association of HLA-A2 with vitiligo in a meta-analysis of all observational studies comparing the frequencies of HLA-A2 between vitiligo individuals and controls during 1966-2005. METHODS: The summary odds ratio (OR) was calculated by using a fixed- or a random-effects model. Meta-regression analysis was undertaken to investigate the effects of study characteristics on the pooled OR. RESULTS: Eleven case-controlled studies fulfilled our inclusion criteria. The studies identified a total of 777 patients and 4820 controls. Meta-analysis showed a significantly increased frequency of HLA-A2 in vitiligo among cases [OR = 2.07, 95\% confidence interval (CI) 1.67-2.58]. Heterogeneity was explained by the quality of the study and the ethnic background of the participants. Meta-regression analysis further showed that the percentage of familial vitiligo among the subjects had a significant effect on the pooled OR (P = 0.008). No study had a significant effect on the pooled OR and no publication bias presented in the studies analysed (P = 0.688). CONCLUSION: These findings strongly suggest an association between HLA-A2 and vitiligo. This article was published in J Eur Acad Dermatol Venereol and referenced in Dermatology and Dermatologic Diseases

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