Comparison of estimated glomerular filtration rate with routine creatinine clearance using a kinetic alkaline picrate assay from Olympus Diagnostica

The Passing Bablok linear regression equation 11 with creatinine clearance as x and eGFR as y was y=0.613x+2.9 with the 95% CIs for the slope and intercept being 0.55 to 0.682 and -0.7 to +6.2, respectively. [...]the slope is significantly different from 1.0 and is consistent with a bias of approximately 38.7% between the two methods. [...]the routine use of eGFR would result in fewer individual patients having a CI that crosses one of the CKD classification cut-offs compared with the CCT.