Test items and specimens included in the proficiency testing
| Test items | Category | Specimen | No. of specimens | ||||
|---|---|---|---|---|---|---|---|
| Year 2022 | Year 2023 | ||||||
| 1st trial | 2nd trial | 1st trial | 2nd trial | ||||
| Newborn screening (fluorescence immunoassay) | Galactosemia (total galactose) | DBS | 6 | 6 | 6 | 6 | |
| Congenital adrenal hyperplasia (17-OH progesterone) | 6 | 6 | 6 | 6 | |||
| Congenital hypothyroidism (TSH, total T4) | 6 | 6 | 6 | 6 | |||
| Newborn screening (MS/MS) | About 45 inherited metabolic disorders including phenylketonuria, maple syrup urine disease, homocystinuria, etc. | DBS | 6 | 6 | 6 | 6 | |
| Other items | |||||||
| Vanillylmandelic acid | Urine | 3 | 3 | 3 | 3 | ||
| Homovanillic acid | Urine | 3 | 3 | 3 | 3 | ||
| Methylmalonic acid | Plasma | 3 | 3 | 3 | 3 | ||
| Catecholamines | Dopamine, epinephrine, norepinephrine | Urine | 3 | 3 | 3 | 3 | |
| Metanephrines | Metanephrine, normetanephrine | Urine | 3 | 3 | 3 | 3 | |
| Metanephrine, normetanephrine | Plasma | 3 | 3 | 3 | 3 | ||
| 3-Methoxytyramine | Plasma | 3 | 3 | ||||
| Organic acids | About 70 organic acids | Urine | 3 | 3 | 3 | 3 | |
| Amino acids | About 40 amino acids | Plasma | 3 | 3 | 3 | 3 | |
Abbreviations: DBS, dried blood spot; 17-OH progesterone, 17-hydroxyprogesterone; TSH, thyroid-stimulating hormone; T4, thyroxine; MS/MS, tandem mass spectrometry.