However, other strong relationships in MR, such as the associations between the cis-regulation of OCIAD1 with stroke (per 1 SD OR: 0.87, 95% CI: 0.82–0.91, Pcausal = 1.54 × 10−7) and breast cancer (per 1 SD OR: 0.78, 95% CI: 0.71–0.86, Pcausal = 1.25 × 10−6), were not mapped by previous GWAS. Here, OCIAD1 is linked to breast carcinoma.