Stratification analyses between IGF-I and IGFBP-3 genotypes and risk of PCa in cases and controls.

*Two-sided χ2 test for either genotype distributions or allele frequencies between the cases and controls.†Adjusted for age, smoking status, drinking status and family history of cancer in logistic regression model; 95% CI: 95% confidence interval.‡The 0–6 represents the numbers of risk alleles within the combined genotypes; the risk alleles used for the calculation were the rs6218C, rs35767T and rs5742612C alleles.