In women, the RBP4-diabetes association was significantly stronger among subjects with lower ALT levels (below median of 21.5 IU/L) than those with higher ALT concentrations (P-interaction =0.004), and it was stronger among individuals with low ferritin levels (below median 150 μg/mL) than those with higher ferritin concentrations (P-interaction =0.03; Table 3). The gene discussed is RBP4; the disease is diabetes mellitus.