Compared to men in the highest PRL category (5-34.9 ng/ml), the adjusted risk of type 2 diabetes increased progressively in those with lower PRL levels (3-4.9 ng/ml): OR (95%CI) = 1.59 (0.93–2.71), and in those in the lowest PRL category (0.3–2.9 ng/ml): OR = 5.45 (1.78–16.62) (Table 3). The gene discussed is PRL; the disease is type 2 diabetes mellitus.