Multicenter study of creatinine- and/or cystatin C-based equations for estimation of glomerular filtration rates in Chinese patients with chronic kidney disease.

However, among the eGFR values, eGFR1, eGFR2, eGFR4 and eGFR5 all showed significant proportional differences (the 95% CI of slopes did not include B = 1) and significant constant differences (the 95% CI of intercepts did not include A = 0) with eGFR6 ( Fig 1 -A, B, D-F); eGFR2 showed the most significant errors of both types (a = −21.267, b = 1.487), and eGFR3 also showed a highly significant constant error ( Fig 1 -C).

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