Laboratory Medicine and Quality Assurance

Table. 4.

Acceptable performance of participants in the accuracy-based creatinine proficiency testing program (2023)

Item Peer group classification No. of acceptable performance (%)
CAC-23-01 CAC-23-02 CAC-23-03 CAC-23-04 CAC-23-05 CAC-23-06
Creatinine All 1,400 (79.2) 1,600 (90.5) 1,647 (93.2) 1,568 (88.3) 1,662 (93.6) 1,631 (91.8)
Enzymatic 177 (93.7) 179 (94.7) 182 (96.3) 184 (96.3) 185 (96.9) 181 (94.8)
kinetic Jaffe without compensation 576 (69.3) 713 (85.8) 753 (90.6) 672 (81.9) 733 (89.3) 703 (85.6)
kinetic Jaffe with compensation 327 (79.2) 378 (91.5) 384 (93.0) 372 (89.2) 403 (96.6) 407 (97.6)
Rate blanked compensated kinetic Jaffe 313 (97.8) 317 (99.1) 315 (98.4) 325 (98.2) 328 (99.1) 326 (98.5)
Other 7 (50.0) 13 (92.9) 13 (92.9) 15 (93.8) 13 (81.3) 14 (87.5)
eGFR All 649 (97.4) 655 (98.3) 650 (97.6) 678 (99.0) 668 (97.5) 666 (97.2)
CKD-EPI (2009) 116 (100.0) 116 (100.0) 116 (100.0) 115 (99.1) 114 (98.3) 114 (98.3)
CKD-EPI (2021) 61 (98.4) 60 (96.8) 60 (96.8) 83 (97.6) 82 (96.5) 82 (96.5)
MDRD 4 variable (IDMS-traceable) 444 (96.9) 449 (98.0) 445 (97.2) 450 (99.1) 443 (97.6) 441 (97.1)
MDRD 4 variable (non-IDMS-traceable) 26 (92.9) 28 (100.0) 27 (96.4) 27 (100.0) 26 (96.3) 26 (96.3)
Cockcroft-Gault 2 (100.0) 2 (100.0) 2 (100.0) 3 (100.0) 3 (100.0) 3 (100.0)

Abbreviations: eGFR, estimated glomerular filtration rate; CKD-EPI, Chronic Kidney Disease Epidemiology Collaboration; MDRD, Modification of Diet in Renal Disease; IDMS, isotope dilution mass spectrometry.

Lab Med Qual Assur 2024;46:78~86 https://doi.org/10.15263/jlmqa.2024.46.2.78
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