Results of the proficiency testing of expanded neonatal screening tests using tandem mass spectrometry in 2019
| Variable | 1st trial | 2nd trial | ||
|---|---|---|---|---|
| No. of institutions | Proportion of correct answers (%) | No. of institutions | Proportion of correct answers (%) | |
| Amino acids | ||||
| Arginine | 15 | 180/180 (100) | 14 | 168/168 (100) |
| Tyrosine | 15 | 180/180 (100) | 14 | 168/168 (100) |
| Phenylalanine | 15 | 180/180 (100) | 14 | 168/168 (100) |
| Methionine | 15 | 178/180 (99) | 14 | 168/168 (100) |
| Citrulline | 15 | 180/180 (100) | 14 | 168/168 (100) |
| Glycine | 15 | 179/180 (99) | 14 | 168/168 (100) |
| Ornithine | 15 | 180/180 (100) | 14 | 168/168 (100) |
| Valine | 15 | 180/180 (100) | 14 | 168/168 (100) |
| Leucine+isoleucine | 15 | 180/180 (100) | 14 | 168/168 (100) |
| Phenylalanine/tyrosine | 13 | 155/156 (99) | 10 | 120/120 (100) |
| Methionine/phenylalanine | 13 | 155/156 (99) | 10 | 120/120 (100) |
| Alanine | 15 | 180/180 (100) | 14 | 168/168 (100) |
| Histidine | 14 | 165/168 (98) | 12 | 138/144 (96) |
| Proline | 14 | 168/168 (100) | 13 | 156/156 (100) |
| Aspartate | 5 | 58/60 (97) | 3 | 36/36 (100) |
| Glutamate | 8 | 96/96 (100) | 8 | 96/96 (100) |
| Acylcarnitines | ||||
| C0 | 15 | 180/180 (100) | 14 | 168/168 (100) |
| C2 | 15 | 180/180 (100) | 14 | 168/168 (100) |
| C3 | 15 | 180/180 (100) | 14 | 168/168 (100) |
| C4 | 15 | 180/180 (100) | 14 | 168/168 (100) |
| C5 | 15 | 180/180 (100) | 14 | 168/168 (100) |
| C6 | 15 | 180/180 (100) | 14 | 168/168 (100) |
| C8 | 15 | 180/180 (100) | 14 | 168/168 (100) |
| C10 | 15 | 180/180 (100) | 14 | 168/168 (100) |
| C12 | 15 | 178/180 (99) | 14 | 168/168 (100) |
| C14 | 15 | 179/180 (99) | 14 | 168/168 (100) |
| C16 | 15 | 180/180 (100) | 14 | 168/168 (100) |
| C18 | 15 | 180/180 (100) | 14 | 168/168 (100) |
| C5DC | 15 | 177/180 (98) | 13 | 156/156 (100) |
| C5-OH | 14 | 165/168 (98) | 12 | 144/144 (100) |
| C3/C2 | 13 | 156/156 (100) | 10 | 120/120 (100) |
| C5/C3 | 11 | 132/132 (100) | 9 | 108/108 (100) |
| C8/C10 | 7 | 82/84 (98) | 6 | 72/72 (100) |
| C5/C0 | 8 | 96/96 (100) | 6 | 72/72 (100) |
| C5/C2 | 12 | 142/144 (99) | 9 | 108/108 (100) |
| C8/C2 | 12 | 142/144 (99) | 9 | 108/108 (100) |