The best estimated protective SNP combinations on the occurrence of breast cancer as determined by PSO.

*The SNP combinations on the occurrence of breast cancer are significantly different (p value<0.05). The meanings of the SNP and genotype numbers are provided in Table 3.

与乳腺癌发生相关的单核苷酸多态性（Single Nucleotide Polymorphism，SNP）组合存在显著差异（P值<0.05）。单核苷酸多态性（SNP）及基因型编号的含义详见表3。