Participants with the highest tertile of resistin and RBP4 were 2.34- and 2.64-times more likely to develop type 2 diabetes compared with those in the lowest tertile (95% confidence interval [CI], 1.43–3.81; P = 0.001; and 95% CI, 1.59–4.37; P < 0.001, respectively) (Fig. 1A). Here, RBP4 is linked to type 2 diabetes mellitus.