Results of the proficiency testing of expanded neonatal screening tests using tandem mass spectrometry in 2021
| Variable | 1st trial | 2nd trial | |||
|---|---|---|---|---|---|
| No. of institutions | Proportion of correct answers (%) | No. of institutions | Proportion of correct answers (%) | ||
| Amino acids | |||||
| Arginine | 15 | 150/150 (100) | 15 | 150/150 (100) | |
| Tyrosine | 15 | 142/150 (94.6) | 15 | 150/150 (100) | |
| Phenylalanine | 15 | 150/150 (100) | 15 | 150/150 (100) | |
| Methionine | 15 | 150/150 (100) | 15 | 150/150 (100) | |
| Citrulline | 15 | 150/150 (100) | 15 | 150/150 (100) | |
| Glycine | 15 | 148/150 (98.6) | 15 | 150/150 (100) | |
| Ornithine | 15 | 146/150 (97.3) | 15 | 145/150 (96.7) | |
| Valine | 15 | 150/150 (100) | 15 | 150/150 (100) | |
| Leucine+isoleucine | 15 | 149/150 (99.3) | 15 | 150/150 (100) | |
| Phenylalanine/tyrosine | 8 | 79/80 (98.8) | 8 | 79/80 (98.8) | |
| Methionine/phenylalanine | 8 | 80/80 (100) | 8 | 80/80 (100) | |
| Alanine | 15 | 141/150 (94) | 14 | 128/140 (91.4) | |
| Histidine | 10 | 98/100 (98) | 10 | 100/100 (100) | |
| Proline | 14 | 140/140 (100) | 14 | 140/140 (100) | |
| Aspartate | 2 | 20/20 (100) | |||
| Glutamate | 9 | 90/90 (100) | 9 | 90/90 (100) | |
| Acylcarnitines | |||||
| C0 | 15 | 150/150 (100) | 15 | 150/150 (100) | |
| C2 | 14 | 140/140 (100) | 14 | 140/140 (100) | |
| C3 | 15 | 149/150 (99.3) | 15 | 149/150 (99.3) | |
| C4 | 15 | 150/150 (100) | 15 | 150/150 (100) | |
| C5 | 15 | 150/150 (100) | 15 | 150/150 (100) | |
| C6 | 14 | 140/140 (100) | 14 | 140/140 (100) | |
| C8 | 15 | 150/150 (100) | 15 | 150/150 (100) | |
| C10 | 15 | 150/150 (100) | 15 | 150/150 (100) | |
| C12 | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| C14 | 14 | 140/140 (100) | 14 | 140/140 (100) | |
| C16 | 15 | 150/150 (100) | 15 | 150/150 (100) | |
| C18 | 14 | 140/140 (100) | 14 | 140/140 (100) | |
| C5DC | 15 | 150/150 (100) | 15 | 150/150 (100) | |
| C5-OH | 14 | 140/140 (100) | 14 | 140/140 (100) | |
| C3/C2 | 8 | 78/80 (97.5) | 7 | 70/70 (100) | |
| C5/C3 | 7 | 67/70 (95.7) | 7 | 67/70 (95.7) | |
| C8/C10 | 4 | 40/40 (100) | 3 | 30/30 (100) | |
| C5/C0 | 4 | 39/40 (97.5) | 3 | 30/30 (100) | |
| C5/C2 | 7 | 70/70 (100) | 7 | 70/70 (100) | |
| C8/C2 | 7 | 70/70 (100) | 7 | 70/70 (100) | |