UMOD and systemic lupus erythematosus: Therefore, this study aimed two objectives the first was to evaluate the association between low serum uromodulin levels and low serum uromodulin adjusted by eGFR with renal flares in SLE excluding effects of potential confounders in multivariable analyses; and to identify the value of low serum uromodulin and low sUmod/eGFR index as a potential diagnostic marker of LN.