Before IPTW, the fibrate group was younger; had a higher prevalence of DM and DM nephropathy and lower prevalence of lower proteinuria; and had more prescriptions of angiotensin converting enzyme inhibitors/angiotensin II receptor blockers, anti-platelet agents, and oral OHA compared with those of the non-fibrate group (the absolute standard deviation [STD] values >0.2). This evidence concerns the gene ACE and diabetes mellitus.