**Figure 3.** **Cumulative impact of two associated SNPs on BA risk.** (**A**) Distribution of cumulative risk alleles in BA cases (red) and controls (blue) for *ADD3* SNP rs17095355 and *GPC1* SNP rs6707262. The ORs are relative to group with zero risk alleles; vertical bars correspond to 95% confidence intervals. Horizontal line denotes the reference value (OR = 1.0). (**B**) Receiver operating characteristic (ROC) curve for assessment of the discriminative power of the risk prediction model. The area under curve (AUC) of the model is 0.58.