NAMPT and type 2 diabetes mellitus: Visfatin: The results for serum visfatin are also depicted in Table 4 and graphically represented in Figure 4, where it can be seen that the concentrations of visfatin were not significantly different between the males (3.82 ± 1.74 ng/mL) and females (3.16 ± 1.62 ng/mL) in the control group; however, the T2DM patients in all four groups, irrespective of gender, showed an increase in visfatin levels.