Table 3. Sigma values of our laboratory and reagent package inserts.
| Laboratory Sigma | Analyser Sigma | |||||
|---|---|---|---|---|---|---|
| Parameter | Source | TEa | Level 1 | Level 2 | Level 1 | Level 2 |
| Albumin (g/L) | CLIA (%) | 8 | 3.1 | 3.1 | 4.8 | 4.8 |
| BV (%) | 3.6 | 1.4 | 1.3 | 1.9 | 1.9 | |
| ALP (U/L) | CLIA (%) | 20 | 4.6 | 4.0 | 7.6 | 11.3 |
| BV (%) | 10.6 | 2.0 | 1.7 | 3.6 | 5.7 | |
| ALT (U/L) | CLIA (%) | 15 | 4.7 | 4.9 | 7.7 | 14.5 |
| BV (%) | 16.1 | 5.0 | 5.3 | 8.4 | 15.5 | |
| Amylase (U/L) | CLIA (%) | 10 | 4.6 | 4.0 | 6.5 | 5.5 |
| BV (%) | 13.2 | 6.2 | 5.4 | 9.0 | 7.6 | |
| AST (U/L) | CLIA (%) | 15 | 6.0 | 5.1 | 9.0 | 18.2 |
| BV (%) | 13.5 | 5.4 | 4.6 | 7.9 | 16.3 | |
| Direct bilirubin (µmol/L) | CLIA (%) | 20 | 6.7 | 8.0 | 5.6 | 12.0 |
| BV (%) | 28.7 | 9.8 | 11.7 | 8.9 | 18.2 | |
| Total bilirubin (µmol/L) | CLIA (%) | 20 | 4.8 | 5.9 | 9.2 | 24.1 |
| BV (%) | 28.3 | 7.1 | 8.7 | 13.1 | 34.5 | |
| Calcium (mmol/L) | CLIA (mmol/L) | 0.25 | 3.1 | 2.2 | 8.6 | 8.0 |
| BV (%) | 2.3 | 0.4 | 0.5 | Neg. | 2.2 | |
| Cholesterol (mmol/L) | CLIA (%) | 10 | 3.4 | 3.1 | 5.6 | 5.5 |
| BV (%) | 8.7 | 2.9 | 2.6 | 4.8 | 4.7 | |
| Chloride (mmol/L) | CLIA (%) | 5 | 2.9 | 2.8 | 5.2 | 4.2 |
| BV (%) | 1.3 | 0.7 | 0.7 | 0.7 | Neg. | |
| Creatinine (µmol/L) | CLIA (%) | 10 | 2.5 | 3.4 | 4.0 | 5.3 |
| BV (%) | 7.5 | 1.9 | 2.6 | 2.9 | 3.8 | |
| GGT (U/L) | CLIA (%) | 15 | 6.1 | 4.0 | 8.0 | 8.0 |
| BV (%) | 17.8 | 7.3 | 4.9 | 9.6 | 9.6 | |
| Glucose (mmol/L) | CLIA (%) | 8 | 3.4 | 3.1 | 6.0 | 7.0 |
| BV (%) | 6.5 | 2.6 | 2.6 | 4.9 | 5.7 | |
| HDL (mmol/L) | CLIA (%) | 20 | 4.7 | 4.3 | 11.3 | 10.9 |
| BV (%) | 11.1 | 2.3 | 2.1 | 4.9 | 5.4 | |
| LD (U/L) | CLIA (%) | 15 | 3.4 | 3.5 | 13.4 | 16.2 |
| BV (%) | 7.7 | 1.3 | 1.3 | 6.7 | 8.1 | |
| Potassium (mmol/L) | CLIA (mmol/L) | 0.3 | 4.9 | 2.4 | 7.6 | 7.0 |
| BV (%) | 4.9 | 2.8 | 2.6 | 3.5 | 8.0 | |
| TP (g/L) | CLIA | 8 | 3.0 | 3.0 | 3.3 | 4.3 |
| BV | 3.5 | 1.3 | 1.3 | 1.4 | 1.6 | |
| Sodium (mmol/L) | CLIA (mmol/L) | 4 | 2.1 | 1.9 | 3.8 | 4.3 |
| BV (%) | 0.7 | 0.3 | 0.4 | 0.1 | Neg. | |
| Triglycerides (mmol/L) | CLIA (%) | 15 | 4.2 | 5.1 | 7.2 | 9.2 |
| BV (%) | 27.0 | 7.6 | 9.2 | 13.2 | 16.7 | |
| Urea (mmol/L) | CLIA (%) | 9 | 2.5 | 2.7 | 6.9 | 8.1 |
| BV (%) | 17.6 | 5.1 | 5.5 | 14.1 | 16.0 | |
| Uric acid (μmol/L) | CLIA (%) | 10 | 4.5 | 3.5 | 5.4 | 6.1 |
| BV (%) | 10.6 | 4.8 | 3.8 | 5.8 | 6.4 | |
| BV - Biological variation. CLIA - Clinical Laboratory Improvement Amendments. TEa - Total allowable error. ALP - Alkaline phosphatase. ALT - Alanine aminotransferase. AST - Aspartate aminotransferase. GGT - Gamma-glutamyltransferase. HDL - High-density lipoprotein cholesterol. LD - Lactate dehydrogenase. TP - Total protein. Neg. – Negative sigma value. | ||||||