Introduction: Recently, a genome-wide association study (GWAS) indicated that rs7216389 polymorphism on chromosome 17q21 was associated with paediatric asthma risk. However, the results remained controversial. Therefore, a meta-analysis was performed.
Evidence Acquisition: A comprehensive literature retrieve was performed on PubMed, Embase and Science Direct databases up to Feb 20, 2016. The strength of association between 17q21 locus rs7216389 polymorphism and pediatric asthma risk was assessed by computing odds ratio (OR) with its corresponding 95% confidence interval (CI).
Evidence Synthesis: A total of 10 studies with 7797 cases and 38757 controls were included. A statistically significant association of rs7216389 polymorphism and pediatric asthma risk was found (OR=1.41, 95%CI=1.34-1.49, P<0.00001). Furthermore, both Caucasians (OR=1.41, 95%CI=1.33-1.49, P<0.00001) and Asians (OR=1.43, 95%CI=1.25-1.63, P<0.00001) with rs7216389 polymorphism showed significant association, respectively. A significantly increased susceptibility was identified in atopic asthma (OR=1.45, 95%CI=1.22-1.72, P<0.00001). In the stratification analysis by study design, both case-control studies (OR=1.40, 95%CI=1.33-1.48, P<0.00001) and cohort studies (OR=2.05, 95%CI=1.32-3.17, P=0.001) showed significant association, respectively.
Conclusions: In conclusion, this meta-analysis suggests that 17q21 locus rs7216389 polymorphism was significantly associated with paediatric asthma risk.
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