Fig. 3. Forest plot of the association between TLR4 Thr399Ile and asthma risk: C allele vs T allele. The forest plot shows the ORs and respective 95% CIs for the studies included in the meta-analysis. For each study in the forest plot, the area of the black square is proportional to the study weight, and the horizontal bar represents the 95% CI. Z score: the standardized expression of a value in terms of its relative position in the full distribution of values.
