Results of the proficiency testing of expanded neonatal screening tests using tandem mass spectrometry in 2020
| Variable | 1st trial | 2nd trial | |||
|---|---|---|---|---|---|
| No. of institutions | Proportion of correct answers (%) | No. of institutions | Proportion of correct answers (%) | ||
| Amino acids | |||||
| Arginine | 14 | 139/140 (99.2) | 15 | 150/150 (100) | |
| Tyrosine | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| Phenylalanine | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| Methionine | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| Citrulline | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| Glycine | 14 | 140/140 (100) | 15 | 148/150 (100) | |
| Ornithine | 14 | 137/140 (97.8) | 15 | 150/150 (100) | |
| Valine | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| Leucine+isoleucine | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| Phenylalanine/tyrosine | 9 | 90/90 (100) | 9 | 88/90 (97.8) | |
| Methionine/phenylalanine | 9 | 88/90 (97.8) | 9 | 90/90 (100) | |
| Alanine | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| Histidine | 10 | 98/100 (98) | 10 | 92/100 (92) | |
| Proline | 13 | 130/130 (100) | 14 | 139/140 (99.3) | |
| Aspartate | 2 | 20/20 (100) | 2 | 20/20 (100) | |
| Glutamate | 7 | 67/70 (95.7) | 8 | 77/80 (96.3) | |
| Acylcarnitines | |||||
| C0 | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| C2 | 13 | 130/130 (100) | 13 | 130/130 (100) | |
| C3 | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| C4 | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| C5 | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| C6 | 13 | 130/130 (100) | 14 | 140/140 (100) | |
| C8 | 14 | 140/140 (100) | 15 | 149/150 (99.3) | |
| C10 | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| C12 | 13 | 130/130 (100) | 14 | 140/140 (100) | |
| C14 | 13 | 130/130 (100) | 14 | 140/140 (100) | |
| C16 | 14 | 140/140 (100) | 15 | 150/150 (100) | |
| C18 | 13 | 130/130 (100) | 14 | 140/140 (100) | |
| C5DC | 13 | 130/130 (100) | 15 | 150/150 (100) | |
| C5-OH | 12 | 120/120 (100) | 14 | 140/140 (100) | |
| C3/C2 | 9 | 90/90 (100) | 8 | 80/80 (100) | |
| C5/C3 | 8 | 80/80 (100) | 7 | 70/70 (100) | |
| C8/C10 | 5 | 50/50 (100) | 4 | 40/40 (100) | |
| C5/C0 | 5 | 50/50 (100) | 4 | 40/40 (100) | |
| C5/C2 | 8 | 80/80 (100) | 7 | 70/70 (100) | |
| C8/C2 | 8 | 80/80 (100) | 7 | 70/70 (100) | |