Scheme Information Sheets
UK NEQAS for Thyroglobulin
| Scheme Particulars | Indicative Details |
|---|---|
| Accreditation body | UKAS |
| ISO/IEC Accreditation status | ISO/IEC 17043:2023 |
| UKAS Accredited Proficiency Testing Provider No | 7860 |
| Objective of Scheme | Provides EQA coverage for both the numerical Thyroglobulin assay used in the follow-up of Thyroid Cancer treatment and also Thyroglobulin Antibody measurement. The latter is only only to validate the Thyroglobulin results themselves as these immunoassays are subject to anaytical interferece from antibodies which are present in a large proportion of patients |
| Pre-, Analytical, Post- status | Analytical/Post |
| Number of distributions per year (nominal) | 11 |
| Specimens per distribution | 3 |
| Number of Specimens per annum | 33 |
| Frequency of distribution | Monthly |
| Scoring system | ABC |
| Material distributed | Single donations or pooled of liquid human serum |
| Programme Director(s) / Organiser(s) | Finlay MacKenzie |
| Criteria for participation | All, but overseas by courier |
| Nominal sample volume (mL) | 0.5 |
| Sample presentation TACs | All analytes in the same tube |
| Data in Chemistry on-line Dashboard | Yes |
| Analyte | Approx Range | Default Units | Target Value | B Score Limit (%) | C Score Limit (%) |
|---|---|---|---|---|---|
| TgAb - interpretation | ~ | N, E or P | ~ | ~ | ~ |
| TgAb - numeric result | 0 – 2500 | kU/L [U/mL] | ALTM | ~ | ~ |
| Thyroglobulin | 0 – 100 | µg/L | ALTM | 75.0 | 75.0 |
| Abbreviation | Expansion |
|---|---|
| ALTM | All Laboratory Trimmed Mean |
| GLTM | Group Laboratory Trimmed Mean – which is the Method Principle Mean |
| MLTM | Method Laboratory Trimmed Mean – usually a manufacturer system / analyser mean |
| XALTM | An external value that may be from a Reference Method System |
| OGLTM | A Method Principle Mean used as the target for all laboratories |
| OMLTM | A specific Method Mean used as a target for all laboratories |
| MED | Median |
