The POR for diabetes (FPG ≥ 126 mg/dL) rose with age, a high serum β2M (POR 3.8, p = 0.002), Cd/Pb exposure category 2 (POR 3.1, p = 0.021), and category 3 (POR 3.7, p = 0.014). The gene discussed is B2M; the disease is diabetes mellitus.