Laboratory Medicine and Quality Assurance

Table. 10.

Proficiency testing results for amino acid analysis (unit, µmol/L)

Year Trial Specimen no. Intended response Reported response No. Reported components No. Median Minimum Maximum
2020 1st CMA-20-01 Hyperphenylalaninemia/phenylketonuria Hyperphenylalaninemia/phenylketonuria 5 Phenylalanine 5 495 438.9 516
CMA-20-02 Citrullinemia Citrullinemia 5 Citrulline 5 252.1 216.7 303
CMA-20-03 No abnormality detected No abnormality detected 5
2nd CMA-20-04 No abnormality detected No abnormality detected 5
CMA-20-05 Maple syrup urine disease Maple syrup urine disease 5 Allo-isoleucine 4 445.5 365.9 534
Isoleucine 5 351.6 279 420.1
Leucine 5 892.8 854.4 1,172
Valine 5 815.1 726 963
CMA-20-06 Hyperlysinemia Hyperlysinemia 5 Lysine 5 546 500.2 631
2021 1st CMA-21-01 No abnormality detected No abnormality detected 5
CMA-21-02 Hyperphenylalaninemia/phenylketonuria Hyperphenylalaninemia/phenylketonuria 5 Phenylalanine 5 799 641.5 825
CMA-21-03 Homocystinuria Homocystinuria 5 Homocystine 5 70.4 60 320
Methionine 5 635 619.8 736
2nd CMA-21-04 No abnormality detected No abnormality detected 5
CMA-21-05 Citrullinemia Citrullinemia 5 Citrulline 5 615.6 508.8 1,003
CMA-21-06 Tyrosinemia type I Tyrosinemia type I 4 Methionine 5 366 328.6 530
Hypermethioninemia 1 Tyrosine 5 366 303.6 608
Lab Med Qual Assur 2022;44:143~158 https://doi.org/10.15263/jlmqa.2022.44.3.143
© Lab Med Qual Assur