Multi-case-control comparison identified two ADIPOR1 variants: rs3737884-G, which was simultaneously associated with an increased risk of T2D, CAD, and T2D+CAD (P-value range, 9.80×10−5−6.30×10−4; odds ratio (OR) range: 1.96–2.42) and 16850797-C, which was separately associated with T2D and T2D+CAD (P-value range: 0.007–0.014; OR range: 1.71–1.77). This evidence concerns the gene ADIPOR1 and type 2 diabetes mellitus.