In Swedish and Finnish populations, respectively, the lactase variant was not associated with a significantly increased risk of prostate cancer.15 Taking our results with these previous findings, the combined odds ratio for prostate cancer in men with at least one copy of the lactase T allele compared to men with no copies was 1.12 (95 % CI: 0.96–1.32). The gene discussed is LCT; the disease is prostate cancer.