The IVW analysis suggested no significant association between genetically determined serum PTH levels and the risk of CAD in patients with diabetes (OR = 1.27, 95% CI: 0.67 – 2.44, P = 0.464), which was confirmed by the sensitivity analyses using the weighted median, MR-Egger and MR-PRESSO methods (Fig. 2). Here, PTH is linked to diabetes mellitus.