Laboratory Medicine and Quality Assurance

Table. 4.

Critical differences based on the general capability according to the Korean Association of External Quality Assessment Service (VI)

Items Unit Mean CV, total (%) CVmin (%) CVmax (%) CVmin (%)×3
AFP ng/mL 6.2 8.3 3.6 13.3 10.8
176.5 8.9 2.1 13.9 6.3
277.0 8.8 2.1 12.1 6.3
CA125 U/mL 84.8 20.0 1.9 6.4 5.7
31.1 17.1 2.8 5.8 8.4
239.5 17.5 2.6 7.0 7.8
CA15-3 U/mL 61.0 5.6 2.7 10.2 8.1
22.6 6.4 3.4 5.9 10.2
124.5 5.9 3.1 8.0 9.3
CA19-9 U/mL 80.5 8.9 2.2 14.2 6.6
23.5 5.6 2.4 15.3 7.2
237.5 12.2 2.6 14.1 7.8
CEA ng/mL 1.8 16.6 4 17.6 12
9.6 6.1 2.2 9.2 6.6
34.3 6.9 1.6 8.8 4.8
PSA, total ng/mL 0.8 9.3 2.1 8.0 6.3
2.8 6.7 1.8 5.7 5.4
13.2 6.0 1.8 6.7 5.4
Free PSA - - - - - -
T3 ng/mL 3.1 11.2 2.4 9.2 7.2
1.0 16.8 3.5 14.3 10.5
1.9 12.1 3.3 9.8 9.9
T4 µg/dL 12.7 8.9 2.2 9.9 6.6
8.1 7.6 2.4 5.5 7.2
11.3 7.3 1.9 10.0 5.7
Free T4 ng/dL 3.5 15.2 2.8 10.1 8.4
1.1 16.1 2.7 9.9 8.1
2.6 14.1 2.3 7.9 6.9
Thyroglobulin ng/mL 8.7 3.8 2.9 4.5 8.7
4.7 3.7 2.5 4.3 7.5
8.6 3.3 1.9 4.0 5.7
TSH µIU/mL 30.3 14.2 2.4 6.2 7.2
0.7 14.5 2.5 6.7 7.5
5.4 13.8 2.3 6.4 6.9
Estradiol pg/mL 646.2 20.9 1.2 20 3.6
54 9.4 3.1 26.5 9.3
321.1 17.4 1.4 12.6 4.2
FSH - - - - - -
LH - - - - - -
Testosterone ng/mL 7.2 8.6 2.5 5 7.5
1.1 5.6 3.8 6.4 11.4
4 9.5 2.4 6.5 7.2
Prolactin ng/mL 52.4 21.2 2.4 6.4 7.2
9.8 17.6 1.7 5.2 5.1
21.2 20.1 2.1 5.1 6.3

Abbreviations: CV, coefficient of variation; AFP, alpha-fetoprotein; CA, cancer antigen; CEA, carcinoembryonic antigen; PSA, prostate-specific antigen; T3, tri-iodothyronine; T4, thyroxine; TSH, thyroid-stimulating hormone; FSH, follicle-stimulating hormone; LH, luteinizing hormone

Lab Med Qual Assur 2022;44:88~98 https://doi.org/10.15263/jlmqa.2022.44.2.88
© Lab Med Qual Assur