Tools, Technologies and Training for Healthcare Laboratories

Sigma Metric Analysis

Analysis of common cortisol assays

Clinical Chemistry had a comprehensive review of the performance of routine serum cortisol assays, including performance on different patient cohorts of males, nonpregnant females, pregnant females, and those under different drug regimens. Is the analytical performance the same for all of these patients? And if not, how big are the differences and how do we finally judge the method performance? Does a Sigma-metric analysis clarify the picture at all?

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Sigma-metrics for HBV

Can we calculate Sigma-metrics for Molecular Diagnostic methods? We came across an early example of applying Sigma-metrics to the evaluation of an HBV method. What happens when we look at performance on the logarithmic scale?

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