PNPLA2 and diabetic kidney disease: We determined that PNPLA2 rs28633403 was significantly associated with decreased risk of DKD in the additive and dominant models, respectively (additive models: GG vs. AA, adjusted OR = 0.588, 95% CI 0.385-0.897, P = 0.014; AG vs. AA, adjusted OR = 0.633, 95% CI 0.447-0.895, P = 0.010; dominant models: adjusted OR = 0.619, 95% CI 0.447-0.857, P = 0.857, P = 0.004).