Pooled ORs and 95%CIs of stratified meta-analysis.

<p>NO: involved studies' number; <i>Gln Lys VS</i>.LysLys: Heterozygote comparison; GlnGln <i>vs</i>.LysLys: Homozygote comparison; GlnGln+GlnLys <i>vs</i>. LysLys: Dominant model; GlnGln <i>vs</i>. GlnLys+LysLys: Recessive model; Random model was chosen for data pooling when <i>P</i><0.10 and/or <i>I<sup>2</sup></i>>50%; otherwise fixed model was used.</p>b<p>the results were excluded due to potential heterogeneity.</p>