Table 5. Comparison between different sigma levels after unifying the TEa source.
| Parameters | TEa source | TEa | SIGMA MRI | SIGMA Zagazig |
Sigma AIN SHAMS |
Sigma private lab |
|---|---|---|---|---|---|---|
| AFP | CLIA | 31.87 | 3.4 | 4.8 | -- | -- |
| ALT | CLIA | 20.00 | 3.9 | 2.4 | 2.1 | 6.2 |
| Alb | CLIA | 10.00 | 5.1 | 4.7 | 0.4 | 4.7 |
| ALP | CLIA | 30.00 | 4.0 | 5.5 | 3.3 | 4.4 |
| BD | RCPA | 20.00 | 1.9 | 4.4 | 1.2 | 3.0 |
| BT | CLIA | 20.00 | 7.8 | 4.1 | 2.7 | 5.1 |
| Calcium | CLIA | 12.20 | 4.5 | 5.2 | 2.0 | 7.8 |
| CEA | RCPA | 12.00 | 0.9 | -- | -- | -- |
| Cholesterol | CLIA | 10.00 | 1.5 | 4.3 | 1.3 | 6.3 |
| Creatinine | CLIA | 15.00 | 1.3 | 3.4 | 1.8 | 3.3 |
| Glucose | CLIA | 10.00 | 6.3 | 3.9 | 4.9 | 3.9 |
| LD | CLIA | 20.00 | 4.2 | 5.3 | -- | 5.0 |
| Magnesium | CLIA | 25.00 | 3.5 | 6.0 | 2.0 | 5.6 |
| Phosphorous | RCPA | 10.15 | 1.2 | 2.2 | -- | 4.1 |
| Total protein | CLIA | 10.00 | 3.0 | 4.4 | 1.2 | 4.6 |
| Triglycerides | CLIA | 25.00 | 7.6 | 10.3 | -- | 12.6 |
| Uric acid | CLIA | 17.00 | 8.6 | 6.7 | 3.0 | 6.1 |
| Urea | RCPA | 21.44 | 10.3 | 5.3 | 2.5 | 7.1 |
| GGT | RCPA | 12.00 | 0.9 | 3.0 | 0.7 | 6.0 |
| Sigma re-calculated for the four participating laboratories using the same source of TEa. TEa – total allowable error. MRI – medical research institute. CLIA - Clinical Laboratory Improvement Amendments. RCPA - Royal College of Pathologists of Australasia.AFP - alpha fetoprotein. ALT - alanine aminotransferase. Alb – albumin. ALP - alkaline phosphatase. BD – billirubin, direct. BT- bilirubin, total. CEA - carcinoembryonic antigen. LD - lactate dehydrogenase. GGT - gamma glutamyltransferase. | ||||||