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The reliability of calculated laboratory results
1Abant Izzet Baysal University, Duzce School of Medicine, Department of Clinical Biochemistry, Duzce, Turkey. Coskun_a2002@yahoo.com
Clinical Chemistry and Laboratory Medicine
|October 6, 2005
Summary
This study introduces a method to assess the reliability of calculated laboratory tests. Ensuring low analytical coefficient of variation in measured components is crucial for accurate calculated results.
Area of Science:
- Clinical Chemistry
- Laboratory Medicine
- Analytical Chemistry
Background:
- Clinical laboratory results are obtained via direct measurement or calculation.
- Reliability of measured tests is controlled, but calculated data lacks similar checks.
- This gap poses risks to patient result accuracy.
Purpose of the Study:
- To develop a method for assessing the reliability of calculated laboratory tests.
- To determine the standard deviation of calculated laboratory tests.
- To provide guidance on when calculation is preferable to direct measurement.
Main Methods:
- Utilized Taylor series expansion for standard deviation calculation.
- Developed an alternative equation to determine the standard deviation of calculated tests.
- Analyzed the impact of measured component variability on calculated results.
Main Results:
- The standard deviation of calculated tests can be reliably determined.
- The analytical coefficient of variation of measured components directly impacts calculated test reliability.
- Lowering the coefficient of variation for measured components is essential for acceptable calculated test accuracy.
Conclusions:
- Accurate calculation of laboratory tests requires thorough analysis of individual component standard deviations.
- The analytical coefficient of variation of measured components must be sufficiently low for reliable calculated results.
- If component variability is too high, direct chemical measurement is recommended over calculation.