Sigma Metric Analysis
We look at a 2008 poster from the AACC/ASCLS convention and evaluate method validation data on the Roche cobas c311. See how the data can be converted into Sigma-metrics and ponder the implications.
A 2008 evaluation study of a new point of care analyzer instrument for rapid complete blood counts. Two key parameters, WBC and Hemoglobin, are analayzed. What does it mean when the study claims the precision and accuracy of the instrument are "within acceptable limits"?
We take a look at a new direct enzymatic method for %HbA1c.
This is a new one for Westgard web: we're going to provide Sigma analysis for a study where Sten Westgard was in fact a co-author on the paper. This poster was presented at the AACC 2008 conference and analyzed the Abbott ARCHITECT c8000
Elevated concentrations of homocysteine (Hcy) are clinically associated with disorders and cardiovascular disease. A recent paper compared six different methods for this important analyte. But in the absence of a CLIA quality requirement, how can we compare performance?