When adjusted for BSA, the estimated glomerular filtration rate (eGFR) based on the modification of diet in renal disease (MDRD) formula was the lowest, whereas the eGFR calculated using the chronic kidney disease epidemiology collaboration (CKD-EPI) formula, which includes creatinine levels and cystatin C, was the highest (Table 1). Here, CST3 is linked to chronic kidney disease.