WCN26-2622 LEAN MASS-CORRECTION OF eGFR STRENGTHENS ASSOCIATIONS OF CKD WITH CARDIOMETABOLIC DISEASE

Serum creatinine (SCr)-based estimated glomerular filtration rate (eGFR) is the most widely applied marker of kidney function in clinical and epidemiological settings. However, its validity is limited, among other factors, by the dependence of serum creatinine levels on muscle mass. Higher lean mass leads to elevated serum creatinine levels independent of kidney function, potentially introducing systematic bias in eGFR estimation. While chronic kidney disease is a recognized and impactful cardiometabolic risk factor, confounding effects may weaken the associations of eGFRSCr with adverse metabolic and cardiovascular outcomes.