Sigma Metric Analysis
In a 2010 study, the performance of an Olympus AU2700 plus was evaluated, using allowable maximum bias and imprecision values from the Ricos et al biologic variation database. Which got us to thinking, what would the metrics be if the Ricos specifications for allowable total error were used? For that matter, what if Rilibak or CLIA quality requirements were used?
In January 2011, the journal, Diabetes Care, published a study of blood glucose meters: Suboptimal Performance of Blood Glucose Meters in an Antenatal Diabetes Clinic. In addition to highlighting some of the findings, we add Sigma-metrics calculations and Method Decision charts.
An abstract from the 2010 AACC/ASCLS meeting compared Three POC Analyzers for HbA1c. Given the recent study from Lenters-Westra and Slingerland (where 6 out of 8 analyzers couldn't meet the standards for analytical performance), how do these three devices fare?
A recent evaluation in CCLM of the Menarini/ARKRAY ADAMS A1c HA-8180V analyzer gives us another opportunity to see if current performance on the market can meet the tightening requirements for HbA1c.
In a 2008 issue of Annals of Clinical Biochemistry, a study looked a seven different 25-hydroxyvitamin D methods, compared with liquid chromatography-tandem mass spectometry. Using quality requirements developed by and derived from Stockl, Sluss, and Thienpont, we examine this methods with Sigma-metric analysis.